russia vs ukraine war essay

ASSOCIATION OF THE UNITED STATES ARMY

Voice for the army - support for the soldier, the russo-ukrainian war: a strategic assessment two years into the conflict.

by LTC Amos C. Fox, USA Land Warfare Paper 158, February 2024  

In Brief Examining the strategic balance in the Russo-Ukrainian War leads to the conclusion that Russia has the upper hand. In 2024, Ukraine has limited prospects for overturning Russian territorial annexations and troop reinforcements of stolen territory. Ukraine’s ability to defend itself against Russian offensive action decreases as U.S. financial and materiel support decreases. Ukraine needs a significant increase in land forces to evict the occupying Russian land forces.

Introduction

The Russo-Ukrainian War is passing into its third year. In the period leading up to this point in the conflict, the defense and security studies community has been awash with arguments stating that the war is a stalemate. Perhaps the most compelling argument comes from General Valery Zaluzhny, former commander-in-chief of Ukraine’s armed forces, who stated as much in an interview with the Economist in November 2023. 1 Meanwhile, there are others, including noted analyst Jack Watling, who emphatically state the opposite. 2  

Nonetheless, two years in, it is useful to objectively examine the conflict’s strategic balance. Some basic questions guide the examination, such as: is Ukraine winning, or is Russia winning? What does Ukraine need to defeat Russia, and conversely, what does Russia need to win in Ukraine? Moreover, aside from identifying who is winning or losing the conflict, it is important to identify salient trends that are germane not just within the context of the Russo-Ukrainian War, but that are applicable throughout the defense and security studies communities.

This article addresses these questions through the use of the ends-ways-means-risk heuristic. In doing so, it examines Russia and Ukraine’s current strategic dispositions, and not what they were in February 2022, nor what we might want them to be. Viewing the conflict through the lens of preference and aspiration causes any analyst to misread the strategic situation. The goal of this article, however, is to take a sobering look at the realities of the conflict, offer an assessment of the situation, and posit where the conflict is likely to go in 2024. 

The overall conclusion is that Russia is winning the conflict. Russia is winning because it possesses its minimally acceptable outcome: the possession of the Donbas, of the land bridge to Crimea, and of Crimea itself. This victory condition, however, is dependent upon Ukraine’s inability to generate a force sufficient to a) defeat Russia’s forces in each of those discrete pieces of territory; b) retake control of that territory; and c) hold that territory against subsequent Russian counterattacks. No amount of precision strike, long-range fires or drone attacks can compensate for the lack of land forces Ukraine needs to defeat Russia’s army and then take and hold all that terrain. Thus, without an influx of resources for the Ukrainian armed forces—to include a significant increase in land forces—Russia will likely prevail in the conflict. If U.S. support to Ukraine remains frozen, as it is at the time of this writing, then Russian victory in 2024 is a real possibility.   

Laying the Groundwork: Situational Implications

Moreover, several other important implications emerge for the defense and security studies community. First, land wars fought for control of territory possess inherently different military end states than irregular wars, counterinsurgencies and civil wars. Therefore, militaries must have the right army for the conflict in which they are engaged. A counterinsurgency army or constabulary force, for instance, will not win a war for territory against an industrialized army built to fight and win wars of attrition. This is something policymakers, senior military leaders and force designers must appreciate and carefully consider as they look to build the armies of the future. 

Second, land wars fought for control of territory require military strategies properly aligned to those ends. Therefore, militaries must have the right strategy for the conflict, or phase of the conflict, in which they are engaged. A strategy built on the centrality of precision strike but lacking sufficient land forces to exploit the success of precision strike, for instance, will not win a war for territory—especially against an industrialized army built to fight and win wars of attrition. Policymakers and senior military leaders must periodically refresh and reframe their political ends and military strategies according to their means; otherwise, they risk a wasteful strategy that fritters away limited resources in the pursuit of unrealistic goals. 

Third, despite statements to the contrary, physical mass—in this case, more manpower—is more important than precision strike and long-range fires where the physical possession of territory is a critical component of political and military victory for both states. Physical mass allows an army to hold and defend territory. The more physical mass an army possesses, the more resilient it is to attacks of any type and the more difficult and costly it is to defeat—whether that be in munitions expended, number of attacks conducted or lives lost. 

Fourth, a prepared, layered and protected defense, like that of Russia’s along the contact line with Ukraine’s armed forces, is challenging to overcome. This challenge grows exponentially if the attacker lacks sufficiently resilient and resourced land forces that are capable of a three-fold mission: (1) defeating the occupying army; (2) moving into the liberated territory; and (3) controlling that land. Armies that are designed to deliver a punch but lack the depth of force structure to continue advancing into vacated or liberated territory after a successful attack, and subsequently are unable to stave off counterattacks, are of little use beyond defensive duty. This finding is at odds with conventional wisdom regarding future force structure that posits that future forces should be small and light and should fight dispersed. 

Fifth, Carl von Clausewitz warns that, “So long as I have not overthrown my opponent, I am bound to fear he may overthrow me. Thus, I am not in control: he dictates to me as much as I dictate to him.” 3 The Russo-Ukrainian War has reiterated Clausewitz’s caution: as neither army is able to outright defeat the other, Russia and Ukraine are locked in a long war of attrition, which is fueling the stalemate to which Zaluzhny refers and Watling rejects. The writing between the lines thus suggests that, when confronted with war, a state must unleash a military force that is capable of both defeating its adversary’s army and simultaneously accomplishing its supplemental conditions of end state, to include taking and holding large swaths of physical terrain. Without defeating an adversary’s army—regardless of its composition—one must then always contend with the possibility that tactical military gains are fleeting. Moreover, by first defeating an adversary’s army, one might turn what would otherwise be a long war of attrition into a short war of attrition.  

Russian Strategic Assessment

Russia’s strategic ends can be summarized as: 

• fracture the Ukrainian state—politically, territorially and culturally; 
• maintain sufficient territorial acquisitions to support a range of acceptable political-military outcomes; 
• maintain strategic materiel overmatch; 
• exhaust Ukraine’s ability to continue fighting—both materially and as regards Ukrainian support from the international community; 
• normalize the conflict’s abnormalities; and 
• undercut and erode Ukraine’s ability to conduct offensive operations to reclaim annexed territory. 

When viewing all of these ends collectively, it is clear that denationalization of the Ukrainian state is Russia’s strategic end in this conflict. Raphael Lemkin defines denationalization as a state’s deliberate and systematic process of eroding or destroying another state’s national character and national patterns (i.e., culture, self-identity, language, customs, etc.). 4 Russia’s policy and military objectives have evolved ever so slightly since February 2022, but Ukraine’s denationalization remains at the heart of the Kremlin’s strategic ends. The Kremlin’s objectives in 2022 included unseating President Volodymyr Zelenskyy, ending Ukrainian self-rule and replacing it with a Russian partisan political leadership, and annexing a significant portion of Ukraine’s territory. To that end, Russian President Vladimir Putin spoke at the time of “denazifying” and “demilitarizing” Ukraine, while also forcing Kyiv to remain politically and militarily neutral within the international community’s network of political and military alliances. 5 Putin reaffirmed these policy aims during a December 2023 press conference in Moscow. 6 Nonetheless, Russia’s military activities—which have not made advances toward Kyiv since Moscow’s initial assault on the capital failed in April 2022—do not indicate any renewed effort to remove Zelenskyy or Ukraine’s government from power. There is, though, a real possibility of this occurring in 2024, especially if U.S. support to Ukraine remains frozen for the foreseeable future. 

It does appear, however, that the Kremlin is attempting to elongate the conflict in time and cost such that Moscow outlasts both Kyiv’s financial and military support from the international community and Ukraine’s material means to continue attempting offensive military activities to reclaim its territory. In doing so, the Kremlin likely intends to accelerate Ukraine to strategic exhaustion and subsequently force Kyiv to broker a peace deal.

As noted recently, Russia’s territorial ambitions of Ukraine likely operate along a spectrum of acceptable outcomes. 7 Presumably, as noted above, Russia’s minimally acceptable outcome—or the minimal territorial holdings that the Kremlin is satisfied to end the war possessing—include retention of the Donbas, the land bridge to Crimea and Crimea (see Figure 1). For clarity’s sake, the land bridge to Crimea includes the Zaporizhzhia and Kherson oblasts—the two oblasts that provide a unified ground link between the Donbas and Crimea. The land bridge is important because it provides Russia a ground-based connection from Russian territory between the occupied Donbas and occupied Crimea, thus simplifying the governance, defense and retention of Crimea.  

2024 will be a pivotal year for Ukraine. If the United States elects a Ukraine-friendly president, then Kyiv can likely expect continued financial and military support from the United States in 2025. On the other hand, if it does not elect a Ukraine-friendly president, then Kyiv can anticipate a range of decreasing financial and military support in the defense of their state against Russian denationalization efforts. 

At the same time, the appearance of Chinese, North Korean and Iranian weapons and munitions on the Ukrainian battlefield indicate that Russia is facing its own challenges keeping up with the conflict’s attritional character. 8 Though the degree to which external support is helping keep its war-machine going in Ukraine is challenging to discern through open-source information, we do know that external support allows the Russian military to overcome some of its defense industry’s production and distribution shortfalls. In turn, Chinese, North Korean and Iranian support allows the Kremlin to continue elongating the conflict in time, space and resources with the goal of exhausting Ukraine’s military and Kyiv’s capacity to sustain its resistance to Russia.   

Russia has already weathered much of the risk associated with invading Ukraine. Economic sanctions hit hard early on, but Russian industry and its economy have absorbed those early hardships and found ways to offset many of those challenges—including through Chinese, North Korean and Iranian support. 9 Further, the West’s gradual escalation of weapon support to Ukraine allowed Russia to develop an equally gradual learning curve to those weapons, and, in most cases, nullify any “game-changing” effects that they might have generated if introduced early in the conflict and with sufficient density to create front-wide effects. 10 Instead, the slow drip of Western support allowed Russian forces to observe, learn and adapt to those weapon systems and develop effective ways to counter Western technology and firepower. 11 The Russian military’s learning process has allowed it to recover from its embarrassing performance early in the conflict and draw into question the U.S. and other Western states’ strategy of third-party support to Ukraine. 12  

The primary risks that the Russo-Ukrainian War poses to Russia today are: (1) The United States and/or NATO might intervene with their land forces on behalf of Ukraine; and (2) political upheaval might occur as a result of domestic unrest. The risk of U.S. and NATO intervention with land forces is low, and will likely remain that way, because of the fear of Russian escalation with tactical or strategic nuclear weapons. 13 Although the likelihood of Russian nuclear strikes in Ukraine is also low, Russian political leaders regularly unsheathe nuclear threats to oppose and deter unwanted activities. 14 Dmitry Medvedev, Deputy Chairman of Russia’s Security Council, recently threated Ukraine with a nuclear response if Ukraine attacked Russian missile launch sites within Russia with Western-supplied, long-range missiles. 15 This follows Russia’s repositioning of some of its nuclear arsenal to Belarus in the summer of 2023. 16 Nonetheless, short of the commitment of U.S. or NATO land forces, or the potential loss of the Crimean peninsula, Russia’s likelihood to actually use nuclear weapons remains low. 

To the second risk—that of domestic unrest creating political instability—Putin and his coterie of supporters continue to use old Russian methods to offset this problem. Arrests, assassinations, disappearances and suppression are the primary methods employed against this challenge and to deter domestic opposition to his policies vis-à-vis Ukraine. 17 The assassination of Yevgeny Prigozhin, the head of the Wagner Group, in August 2023, is perhaps the most high-profile example of this technique. 18 Further, the periodic disappearances and imprisonments of Alexei Navalny is another example of the Putin regime attempting to keep political opposition quiet. 19 Longtime Kremlin henchman, Igor Girkin, who was extremely critical of Putin and of the Kremlin’s handling of the war in Ukraine during 2023, was sentenced to four years in prison in January 2024. 20 Moreover, the suppression of journalists within Russia is spiking as Putin seeks to silence opposition and punish dissent in the wake of the strong economic and domestic upheavals caused by his war. 21

In addition, former U.S. Army Europe commander, Lieutenant General Ben Hodges, USA, Ret., states that Russia mobilizes citizens from its peripheral and more rural areas for its war in Ukraine. 22 Many of these individuals are ethnic minorities and therefore of lesser importance in Putin’s (and many Russians’) social hierarchy. 23 According to Hodges, by pulling heavily from the areas outside of Russia’s major population centers, to include Moscow and St. Petersburg, Putin is able to offset a significant potential domestic unrest by thrusting the weight of combat losses into the state’s far-flung reaches, to be borne by those with less social status. 24 Doing so buys Putin more time to continue the conflict and attempt to bankrupt both Ukrainian and Western resolve.   

Means are the military equipment and other materiel that a military force requires to create feasible ways. Moreover, means operate as the strategic glue that binds a military force’s ends with their ways. As mentioned in the Ends section, Russian industry appears to be challenged by the Russian armed forces’ demand for military equipment and armaments. The Russian armed forces’ ways—or approach to operating on the battlefield against Ukraine—is resource-intensive. Early Russian combat losses—the result of stalwart Ukrainian fighting coupled with inept Russian tactics—generated massive logistics challenges for Russia. Further, Russia has continued to fight according to long-standing Russian military practice: lead with fires, and move forward incrementally as the fires allow. The incremental advances, however, have also come at extreme costs in men and materiel. Jack Watling and Nick Reynolds, for instance, refer to Russian fighting at the battles of Mariupol and Bakhmut as relying on “meatgrinder tactics” in which human-wave attacks are used to advance Russian military interests. 25 As of 20 February 2024, Russia has lost 404,950 troops, 6,503 tanks, 338 aircraft and 25 ships, among many other combat losses; the losses that they have afflicted on Ukrainian forces remains largely unknown. 26  

As noted by Kyrylo Budanov, Ukraine’s chief intelligence officer, Russia’s use of proxy forces is the primary way in which they have sought to offset land force requirements and to relieve some of the stress on their own army. 27 The contractual proxy, the Wagner Group, and the Donetsk and Luhansk People’s Armies (DPA and LPA, respectively)—both cultural proxies—were the primary proxies used between the renewed hostilities of February 2022 through the summer of 2023. The Wagner Group’s attempted coup in June 2023 naturally cooled the Kremlin’s reliance on it. At the same time, Russia’s military operations have become less offensive and more defensive, seeking to retain land already annexed, as opposed to confiscating more Ukrainian territory. Consequently, Moscow’s demand for more land forces and disposable infantry has somewhat diminished. 

Nonetheless, fighting a defensive war along the contact line across the Donbas and the land bridge to Crimea has increased Russia’s need for drones and strike capability. As noted previously, Russia has maintained good diplomatic relationships with China, North Korea and Iran; this has allowed the Russian armed forces access to important weaponry from those states for use on the battlefield in Ukraine. Thus, despite the potential for economic sanctions to cripple Russia’s ability to wage war, the Kremlin has diversified its bases of economic and military power to ensure that it has the means it requires to continue the conflict with Ukraine. Moreover, this has allowed Russia to overcome many of the advantages that Ukraine obtained through the introduction of U.S. and other Western-supplied military aide and so to return theater-level stasis to the battlefield. Put another way, Russia’s ability to diversify its means has allowed it to generate a stalemate—which works in Moscow’s favor—and to keep the conflict going, with the goal of outlasting the international community’s military support and exhausting Ukraine’s ability to continue fighting. 

Considering Russia’s diverse bases of power, it is likely that battlefield stasis—or stalemate—will continue through 2024. In fact, this is probably Russia’s preferred course of action. It is likely that Russia is seeking to elongate the conflict through the upcoming U.S. presidential election, in hopes that the United States will elect a president who is not as friendly toward Kyiv and the Ukrainian fight for sovereignty—namely, one that will eliminate U.S. support to Ukraine’s war effort altogether.   

Ways are the specific methods an actor seeks to obtain their ends, with deference to their means. Ways consist of many supporting lines of operation or lines of effort. Moreover, many complimentary campaigns and operations can exist simultaneously within a strategy’s ways. Further, from a taxonomical position, the dominant approach or line of operation (or effort) within a strategy’s ways often becomes shorthand for a combatant’s general strategy. To that end, Russia’s strategy can be considered a strategy of exhaustion. 

Russia’s strategy of exhaustion can be broken into five lines of effort: 

• incrementally increase territorial gains to support negotiations later down the line; 
• fortify territorial gains to prevent Ukrainian efforts to retake that land; 
• destroy Ukraine’s offensive capability to prevent future attempts to retake annexed territory; 
• temporally elongate the conflict to outlast U.S. and Western military support; and 
• temporally and spatially elongate the conflict to exceed Ukraine’s manpower reserves. 

Early in the conflict, Russia’s strategy focused on the conquest of Ukrainian territory. The scale is up for debate, but Russian military operations indicated that they intended to take Kyiv, the oblasts that paralleled both sides of the Dnieper River, and all the oblasts east of the Dnieper to the Ukraine-Russia international boundary. This operation floundered, but Russia was able to extend their holdings in the Donbas, retain Crimea and obtain the land bridge to Crimea—which had been a goal of their 2014–2015 campaign, one that they came up short on at that time. 28  

As noted in the Means section above, Russia attempted limited territorial gains through 2023. 29 The attainment of any further Ukrainian territory is likely only for negotiation purposes. With that, if and when Russia and Ukraine reach the point in which they must negotiate an end to the conflict, Russia can offer to “give back” some of Ukraine’s territory as a bargaining chip so that it can hold onto what it truly desires: retention of the Donbas, the land bridge to Crimea and Crimea. This is a trend that will likely continue through 2024; we can expect to see Russia attempting to extend their territorial holdings along the contact line, arguably for the purpose of improving their bargaining position if and when negotiations between the two states come to fruition. 

Further, Russia seeks to cause Ukraine’s war effort to culminate by depleting Ukrainian materiel and manpower—both on hand and reserves. Putin states that Russia currently has 617,000 soldiers participating in the conflict. The number of combat forces within Ukraine is unknown. 30 Nonetheless, significant battles, such as Mariupol, Bakhmut, Avdiivka and others, while tough on Russia, are of serious concern for Ukraine. Russia’s population advantage in relation to Ukraine means, quite simply, that the Kremlin has a much deeper well from which to generate an army than does Kyiv. Therefore, Russia continues to leverage its population advantages over Ukraine in bloody battles of attrition to exhaust Ukraine’s ability to field forces. The Kremlin’s attempt to cause the Ukrainian armed forces to culminate shows signs of success. In December 2023, for instance, Zelenskyy stated that his military commanders were asking for an additional 500,000 troops. 31 Zelenskyy called this number “very serious” because of the impact it would have on Ukrainian civil society. 32 Budanov more recently echoed Zelenskyy, stating that Ukraine’s position was precarious without further mobilizations of manpower. 33  

Russia’s strategy of exhaustion, therefore, appears to be working. Russian mass has generally frozen the conflict along the lines of Russia’s minimally acceptable outcome noted previously, i.e., the retention of the Donbas, the land bridge to Crimea and Crimea. This reality flies in the face of General Chris Cavoli, commander of U.S. Army European Command and Supreme Allied Commander Europe, who emphatically stated: “Precision can beat Mass. The Ukrainians have showed that this past autumn. But it takes time for it to work, and that time is usually bought with space. And so, to use this method, we need space to trade for time. Not all of us have that. We have to compensate for this in our thinking [and] our planning.” 34  

While U.S. and Western-provided precision strike might have helped Ukraine in some early instances within the conflict, Russian mass, coupled with Russian’s intention on retaining territory, is disproving Cavoli’s hypothesis. Further, the sacrifice of territory for time that Cavoli refers to actually plays to the favor of Russian rather than Ukrainian political-military objectives. The land that Ukrainian forces have involuntarily ceded to Russian land forces is not likely to be retaken by precision strike. Ukraine will require a significant amount of land forces, supported by joint fires and precision strike, to dislodge Russian land forces, to control the retaken territory, and to hold it against subsequent Russian counterattacks.   

Russian Strategic Assessment: Summary

If winning in war is defined by one state’s attainment of their political-military objectives at the cost of their adversary’s political-military objectives, then Russia appears to possess the upper-hand through two years of conflict (see Table 1). Russia’s strategy of exhaustion and territorial annexation appears to be working, albeit at high costs to the Russian economy and the Russian people. Russia has had to diversify its bases of power to maintain the war stocks required to execute its strategy of exhaustion, and it has had to exact a heavy toll on the Russian people to conduct the bite-and-hold tactics needed to make its territorial gains. Considering that Russia is largely on the defensive now, holding its position along the time of contact, the toll on the Russian people will likely decrease in the coming year. Moreover, considering its heavily fortified defensive position, it will likely maintain the upper hand on the battlefield through 2024.  

Ukrainian Strategic Assessment

Ukraine’s focus remains to liberate its territory from Russian occupation and restore its 1991 borders with Russia, which includes restoring its sovereignty over the Donbas and Crimea. 35 Beyond that, Ukraine continues to work to strengthen its bonds with the West. From security assistance partnerships to working on joining the European Union (EU), Zelenskyy and his government continue to press the diplomatic channels to maintain and gain political, military and economic support from the international community. 36

Kyiv’s efforts to join the EU and continue to maintain support from the international community are arguably much more realistic than its objective to remove Russian military forces—to include Russian proxies—from Ukraine’s territory. The classic board game Risk provides an excellent analogy for what Ukraine must do. In Risk, to claim or reclaim a piece of territory on the map, a player must attack and defeat the army occupying a territory. If (and when) the attacker defeats the defender, the attacker must then do two things—not just one. The attacker must not only move armies into the conquered territory, but he must also leave at least one army in the territory from which he initiated his attack. In effect, any successful attack diffuses combat power, and this is on top of any losses suffered during the attack. And yet, the attacker must identify the appropriate balance of armies between the newly acquired territory and the territory from which he attacked. An imbalance in either territory creates an enticing target for counterattack by the vanquished occupier. 

Ukraine finds itself in just such a position; however, instead of just attacking to retake one small portion of its territory, Ukraine must work to reclaim nearly 20 percent of its territory. 37 Compounding this problem is the size of Russia’s occupation force. As noted previously, Putin indicated that Russia has 670,000 soldiers committed to the conflict—this is more than a 200 percent increase from Moscow’s initial 190,000-strong invasion force. 38 It is challenging to verify Putin’s numbers, or to identify how those numbers are split between combat and support troops, and troops operating in Ukraine vice support troops committed to the conflict but operating in Russia. Nonetheless, for the sake of argument, let’s assume all 670,000 Russian troops are in Ukraine. Using the traditional attacker-to-defender heuristic, which states that a successful attack requires three units of measure to every one defensive unit of measure (3:1), and using individual troops as the unit of measure, we find that a successful Ukrainian attack would require more than two million troops to execute the sequence outlined above. 

Are two million troops really what’s required to evict Russian land forces from Ukraine and hold it against a likely counterattack? Some analysts—both old and current—suggest that the 3:1 ratio is flawed, not relevant, or both. 39 Or does modern technology obviate the need for some of those land forces, as Cavoli suggested? 

The fact of the matter remains: Long-range precision strike, drones of all types and excellent targeting information have done what complimentary arms and intelligence have always done—they have supported the advance or defensive posture of competing land forces, but they have not supplanted it. Moreover, technology must be viewed in the context of both the operations that it is supporting, but also the adversarial operations that it seeks to overcome. If it is correct that Russian strategy is primarily concerned with retaining its territorial acquisitions at this point, and thus Russian military forces are focused on conducting defensive operations, and that Ukrainian land forces do not have the numbers to conduct the attack-defeat-occupy-defend sequence in conjunction with those other components of combined arms operations, then the precision strike, drones and targeting information might be the window dressing for a futile strategic position. Seen in this light, Kyiv’s strategy is out of balance; that is, Kyiv’s ends exceed the limits of its means. The effect of this situation has contributed to the conflict being characterized as a war of attrition.  

The greatest risk to Ukraine’s strategy for winning the war against Russia is the loss of U.S. political, financial and military support. The loss of support from other European partners closely follows in order of importance. A great deal has been written about this in other publications, and as a result, this section will examine other strategic risks. 

One of Kyiv’s biggest strategic risks is exhausting or diffusing its military force so much so that Russian land forces might attack and confiscate additional Ukrainian land through increasingly vulnerable positions. For instance, Ukraine’s counteroffensive in the summer of 2023 could have very well created so-called soft spots in Ukraine’s lines through which a localized counterattack might create an operational breakthrough. That did not happen, but this situation is something that strategic military planners must consider if Zelenskyy and his government truly intend to liberate all of Ukraine’s territory from Russia.

In addition, the reclamation of Crimea is something that is potentially a game-changing situation. Putin has stated the Crimea is Russia’s red line, indicating that a nuclear retort could likely coincide with any legitimate Ukrainian attempt to retake the peninsula. 40 Therefore, Putin’s red line is something policymakers and strategists in Kyiv would have to consider before enacting any attempt to seize and hold Crimea. Might Putin’s red line be a bluff? Perhaps. But the threat of nuclear strike, coupled with Putin’s move of nuclear weapons into Belarus and his repositioning of nuclear strike weapons close to Ukraine earlier in the conflict, demonstrate some credibility to the threat.   

As noted extensively in the section on Ukraine’s strategic ends, manpower is the biggest resource inhibiting Ukraine from attaining its political-military objectives. 41 As Zaluzhnyi notes in a recent essay, Ukraine’s recruiting and retention problems, coupled with a fixed population, no coalition to share the manpower load and two years of killed in action and other casualties, have put Ukraine in this position. 42 It is not a position that they are likely to overcome, even if Kyiv initiates a conscription system. Considering the 3:1 math outlined above, Kyiv theoretically needs to generate a trained army of more than two million troops if it hopes to remove Russian land forces from Ukraine. Moreover, if technology enthusiasts are correct and precision strike weapons, drones and advanced intelligence could shift the 3:1 ratio to perhaps 2:1 or even 1.5:1 in open combat, that advantage would shift back toward the defenders in urban areas. This is because of considerations of International Humanitarian Law and the challenges of targeting in more respective operating environments—a useful segue to discuss combat in urban areas. 

The math gets even more challenging when this context is applied. Trevor Dupuy writes that, “The 3:1 force ratio requirement for the attacker cannot be of useful value without some knowledge of the behavioral and other combat variable factors involved.” 43 As such, factors such as the operating environment, the type of opponent and the method in which they have historically fought must also be applied to the situation. Theory and military doctrine both suggest that the ratio for attacker to defender in urban operating environments increases from 3:1 to 6:1. 44  

Considering the large number of cities in Ukraine’s occupied areas, as well as their breadth and the depth of the front that Kyiv’s forces would have to work through, this poses a significant challenge. Hypothetically, Russian forces might strong-point places like Donetsk City, Mariupol, Melitopol, Simferopol and Sevastopol, creating a network of interlocked spikes in required strength—from 3:1 to 6:1—and thus increasing the overall combat power required by Ukraine to remove Russian military forces from the country. 

Moreover, if Ukraine is able to remove Russian land forces from Ukraine, the question of insurgency must also come into the equation. Retaking physical territory is one thing; securing the loyalty of the people in that territory is quite another. Vast portions of Donetsk and Luhansk oblasts, as well as the entirety of Crimea, have been occupied by Russia for a decade. The political loyalties, cultural affiliation and domestic politics of the population in those areas are far from certain at this point. Thus, the chance for an insurgency in the Donbas and Crimea must also be considered when calculating the means—in this case, human capital—required to conduct operations to reclaim and hold lost territory. 

Already running short of needed ammunition, to include artillery, missiles and air defense missiles, Ukraine’s ammunition crunch is likely to accelerate through 2024. This is yet another concern raised by Zaluzhnyi in his recent essay on what Ukraine needs to survive and win against Russia. 45 At the time of this writing, Congress has failed to approve the Department of Defense’s latest funding requests for Ukraine. Whether they move forward on that remains to be seen. Nonetheless, for the purpose of continuing the discussion, let’s assume that Congress approves the funding in March 2024. But by that time, that lapse in funding will have created a lapse in support to Ukraine, exacerbating an already tenuous ammunition situation and potentially creating something far more critical. As it currently stands, Ukrainian units are approaching the point at which they are able to do little more than defend their positions and maintain the front lines. 46 Moving forward in time, Ukrainian units will not be able to conduct robust offensive operations—which would require methodically penetrating Russian defensive belts and destroying Russian land forces in stride—because they will not have enough ammunition. 

A lag will also develop between the time in which Congress authorizes funds for Ukraine, the time that the military can deliver the equipment associated with those funds to Ukraine’s armed forces and the time that the Ukrainian armed forces can put that equipment to use on the battlefield. In the interim period between Congressional approval and the Ukrainian forces putting the equipment to use in the field, the risk of Russian tactical and operational military offensive operations increases, while Ukraine’s risk of successful defensive operations decreases. Therefore, one might expect to see Russian land forces attempting to penetrate Ukrainian lines in the coming months in an effort to exploit Ukraine’s ammunition crisis and, as noted earlier, to take additional territory to strengthen its bargaining position later down the road.   

Having examined Ukraine’s strategic ends and the challenges presented to those ends by both Ukraine’s risks and means, the ways is a fairly simple discussion. Ukraine’s limited manpower and ammunition base already limits what Ukraine can do offensively. If Russian forces in Ukraine do actually approach 670,000, and the 3:1 ratio (or 6:1 ratio) are accurate planning considerations, Kyiv would have to generate, at a minimum, the men, materiel and ammunition for a two million-soldier army to retake the Donbas, the land bridge to Crimea and Crimea. Moreover, this does not account for any counterattacks that might follow Ukrainian success or for potential insurgencies in any of those newly liberated areas. 

In recent conversations on the subject, Michael Kofman and Franz-Stefan Gady made mention of this and suggested that, for the foreseeable future, Ukrainian forces are limited to defensive operations along the contact line and to small, limited objective offensives with operations rarely exceeding platoon size. 47 Hardly a way to win a war. Although Gady’s assessment of Ukraine’s position was more optimistic than Kofman’s, both analysts suggest a very challenging 2024 for Kyiv’s armed forces. Considering the strategic balance, Gady and Kofman are correct—Ukraine will be quite challenged in 2024 to do much more than defend the contact line with sufficient force to prevent Russian breakthroughs. Avdiivka is a case in point. 

Avdiivka—located along the contact line in Donetsk oblast—is the conflict’s current hot spot. Russian land forces continue to use “meat assaults” to attrite Ukrainian men, materiel and equipment in the city in hopes of extending their territorial annexation and exhausting Ukraine’s ability to continue fighting. 48 After months of fighting, Russia appears to be on the cusp of claiming the city. 49 Accurate casualty numbers are challenging to identify at this point, but reports indicate that thousands of troops on both sides have died as the struggle for the city churns through men and resources. Holding the line against robust Russian attacks, like that at Avdiivka, is likely to be the maximum extent of Ukrainian operations through 2024.  

Ukrainian Strategic Assessment: Summary

The most basic finding is that Ukraine has culminated and is not capable of offensive operations at the scale and duration required to retake the Donbas, the land bridge to Crimea or Crimea. What’s more, the Ukrainian armed forces will require a significant augmentation of land power to remove Russia from Ukraine’s territory. Precision strikes and air power will help in this endeavor, but Ukrainian infantry and armored forces must still move into the terrain, clear the terrain of Russian land forces, hold the terrain and then prevail against any Russian counterattacks. Therefore, onlookers should not expect any grand Ukrainian offensive through 2024. Ukraine might attempt one or two smaller scale offensives to nibble away Russian held territory, but anything larger exceeds Ukraine’s means. 

If U.S. support to Ukraine remains frozen for an extended period of time, Ukraine’s ability to just hold the contact line with Russia will deteriorate further. U.S. weapons, ammunition and military equipment are vital to Ukraine’s ability to defend itself. Each day without that support adds more fragility to Ukraine’s supply network, its artillery forces and its land forces. It means increasing weaknesses proliferating through the Ukrainian armed forces and Kyiv’s inability to develop useful military strategy. In short, 2024 looks bleak for Ukraine and for its ability to meet its political-military objectives.   

If, however, U.S. support to Ukraine is unlocked relatively soon, Ukraine’s ability to defend itself will still see a slight dip in capability, but it will likely rebound quickly. Nonetheless, Ukraine’s manpower challenges will still prevent it from any large-scale offensives during 2024. The influx of long-range precision strikes, air power and intelligence from the United States—and other Western nations—will help mitigate some of the personnel challenges, but certainly not completely obviate that concern. Therefore, the attritional grind of forces aligned on opposing trench networks is likely to characterize the conflict throughout 2024.   

The Russo-Ukrainian War is currently in stasis. This stalemate is the result of competing strategies, one of which is focused on the retention of annexed territory—and the other on the vanquishment of a hostile force from its territory without the means to accomplish that objective. Considering the balance in relation to each state’s ends, Russia is currently winning the war (see Table 3). Russia controls significant portions of Ukrainian territory, and they are not likely to be evicted from that territory by any other means than brutal land warfare, which Ukraine cannot currently afford. What’s more, it is debatable if Ukraine will be able to generate the forces needed to liberate and hold the Donbas, the land bridge to Crimea and Crimea. It would likely take an international coalition to generate the number of troops, combat forces and strike capabilities needed to accomplish the liberation of Ukraine’s occupied territory. This international coalition materializing is extremely unlikely to happen.

As stated in the Introduction, land wars fought for territory possess different military end goals than irregular wars, counterinsurgencies and civil wars. Moreover, a strategy’s ends must be supported first by its means, and secondarily, by resource-bound ways to accomplish those ends. Thus, precision strike strategies and light-footprint approaches do not provide sufficient forces to defeat industrialized armies built to fight wars based on the physical destruction of opposing armies and occupying their territory. Robust land forces, capable of delivering overwhelming firepower and flooding into territory held by an aggressor army, are the future of war, not relics of 20th century armed conflict. This is not a feature of conflict specific to Europe, but, as John McManus notes, something that has also been proven in east Asia during U.S. operations in the Pacific theater during World War II. For instance, McManus notes that the U.S. Army employed more divisions during the invasion of The Philippines than it did during the invasion of Normandy. 50 Given the considerations that policymakers face regarding a China-Taiwan conflict scenario, it is useful to take into account McManus’ findings, as well as the realities of war laid bare in Ukraine. If China were to invade Taiwan, with the intention of annexation, then similar factors to that of the Russo-Ukrainian War are worth weighing. Large, robust land forces would be required to enter, clear and hold Taiwan. 

Moreover, Russia’s operations in Ukraine illustrate that mass beats precision, and not the other way around. Precision might provide a tactical victory at a single point on the battlefield, but those victories of a finite point are not likely to deliver strategic victory. Further, denigrating Russia’s mass strategy as “stupid” misses the point. If Russia delivers strategic victory, it cannot be that illogical, regardless of how dubious the methods. Ultimately, Russia’s operations in Ukraine show that mass, especially in wars of territorial annexation, are how a state truly consolidates its gains and hedges those military victories against counterattacks.   

Finally, the Russo-Ukrainian War illustrates how important it is to eliminate an enemy army to insulate one’s state from see-saw transitions between tactical victories. Clausewitz asserts that an undestroyed army always presents the possibility of returning to the battlefield and undercutting its adversary’s aims. Ukraine’s inability to eliminate Russia’s army and remove it from the battlefield in Ukraine means that Kyiv will have to continually wrestle with the Kremlin aggressively pursuing its aims in Ukraine. Ukraine’s inability to generate the size of force, coupled with the destructive warfighting capabilities needed to destroy Russia’s army in Ukraine and to occupy and hold the liberated territory, means that this war of attrition will likely grind on until either Ukraine can generate the force needed to evict Putin’s army from Ukraine, Ukraine becomes strategically exhausted and has to quit the conflict, or both parties decide to end the conflict. Regardless of the outcome, 2024 will likely continue to see Russia attempting to strategically exhaust Ukraine; meanwhile, Kyiv will do its best to maintain its position along the contact line as it tries to recruit and train the army needed to destroy Russia’s army and to liberate its territory.

Amos Fox is a PhD candidate at the University of Reading and a freelance writer and conflict scholar writing for the Association of the United States Army. His research and writing focus on the theory of war and warfare, proxy war, future armed conflict, urban warfare, armored warfare and the Russo-Ukrainian War. Amos has published in RUSI Journal and Small Wars and Insurgencies among many other publications, and he has been a guest on numerous podcasts, including RUSI’s Western Way of War , This Means War , the Dead Prussian Podcast and the Voices of War .

• “The Commander-in-Chief of Ukraine’s Armed Forces on How to Win the War,” Economist , 1 November 2023.
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• Carl von Clausewitz, On War , trans. and eds. Michael Howard and Peter Paret (Princeton, NJ: Princeton University Press, 1984), 77.
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• “China’s Position on Russia’s Invasion of Ukraine,” US-China Economic and Security Review Commission , 31 December 2023; Robbie Gramer, “Iran Doubles Down on Arms for Russia,” Foreign Policy , 3 March 2023; Kim Tong-Hyung, “North Korea Stresses Alignment with Russia Against US and Says Putin Could Visit at an Early Date,” ABC News , 20 January 2024.
• Tong-Hyung, “North Korea Stresses Alignment with Russia”; “China’s Position on Russia’s Invasion of Ukraine”; Darlene Superville, “The White House is Concerned Iran May Provide Ballistic Missiles to Russia for Use Against Ukraine,” Associated Press , 21 November 2023.
• Matthew Luxmoore and Michael Gordon, “Russia’s Army Learns from Its Mistakes in Ukraine,” Wall Street Journal , 24 September 2023.
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• Bryan Frederick et. al., Escalation in the War in Ukraine: Lessons Learned and Risks for the Future (Santa Monica, CA: RAND, 2023), 77.
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• Gutterman, “The Week in Russia: Carnage and Clampdown.” 
• Robert Picheta et al., “Pro-War Putin Critic Igor Girkin Sentenced to Four Years in Prison on Extremist Charges,” CNN , 25 January 2024.
• Robert Coalson, “How the Russian State Ramped Up the Suppression of Dissent in 2023: ‘It Worked in the Soviet Union, and It Works Now,’” Radio Free Europe/Radio Liberty , 31 December 2023.
• Ben Hodges, “Ukraine Update with Lieutenant General (Retired) Ben Hodges,” Revolution in Military Affairs [podcast], 1 January 2024.
• Sven Gunnar Simonsen, “Putin’s Leadership Style: Ethnocentric Patriotism,” Security Dialogue 31, no. 3 (2000): 377–380. 
• Hodges, “The Ukraine Update.” 
• Jack Watling and Nick Reynolds, Meatgrinder: Russian Tactics in the Second Year of Its Invasion of Ukraine (London: Royal United Services Institute, 2023), 3–8.
• The Kyiv Post keeps a running tally of these figures and other Russian losses in a ticker across the top of their homepage: https://www.kyivpost.com .
• Christopher Miller, “Kyrylo Budanov: The Ukrainian Military Spy Chief Who ‘Likes the Darkness,’” Financial Times , 20 January 2024.
• “Ukraine in Maps: Tracking the War with Russia,” BBC News , 20 December 2023.
• Constant Meheut, “Russia Makes Small Battlefield Gains, Increasing Pressure on Ukraine,” New York Times , 22 December 2023.
• Jaroslav Lukiv, “Ukraine Seeks Extra Soldiers – President Zelenskyy,” BBC News , 19 December 2023.
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• Lukiv, “Ukraine Seeks Extra Soldiers.” 
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• Christopher Cavoli, “SACEUR Cavoli – Remarks at Rikskonferensen, Salen, Sweden,” NATO Transcripts , 8 February 2023.
• Olivia Olander, “Ukraine Intends to Push Russia Entirely Out, Zelenskyy Says as Counteroffensive Continues,” Politico , 11 September 2022; Guy Davies, “Zelenskyy to ABC: How Russia-Ukraine War Could End, Thoughts on US Politics and Putin’s Weakness,” ABC News , 9 July 2023.
• Angela Charlton, “Ukraine’s a Step Closer to Joining the EU. Here’s What It Means, and Why It Matters,” Associated Press , 14 December 2023.
• Visual Journalism Team, “Ukraine in Maps: Tracking the War with Russia,” BBC News , 20 December 2023.
• “Russia-Ukraine Tensions: Putin Orders Troops to Separatist Regions and Recognizes Their Independence,” New York Times , 21 February 2022.
• John Mearsheimer, “Assessing the Conventional Balance: The 3:1 Rule and Its Critics,” International Security 13, no. 4 (1989): 65–70; Michael Kofman, “Firepower Truly Matters with Michael Kofman,” Revolution in Military Affairs [podcast], 3 December 2023.
• Vladimir Isachenkov, “Putin Warns West: Moscow Has ‘Red Line’ About Ukraine, NATO,” Associated Press , 30 November 2021.
• Maria Kostenko et al., “As the War Grinds On, Ukraine Needs More Troops. Not Everyone Is Ready to Enlist,” CNN , 19 November 2023.
• Valerii Zaluzhnyi, “Modern Positional Warfare and How to Win It,” Economist , accessed 24 January 2024.
• Trevor Dupuy, Numbers, Predictions, and War: Using History to Evaluate Combat Factors and Predict the Outcome of Battles (Indianapolis, IN: Bobbs-Merrill Company, Inc., 1979), 12.
• Army Training Publication 3-06, Urban Operations (Washington, DC: Government Printing Office, 2022), 5-23.
• Zaluzhnyi, “Modern Positional Warfare and How to Win It.” 
• Olena Harmash and Tom Balmforth, “Ukrainian Troops Face Artillery Shortages, Scale Back Some Operations – Commander,” Reuters , 18 December 2023.
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• Joseph Ataman, Frederick Pleitgen and Dara Tarasova-Markina, “Russia’s Relentless ‘Meat Assaults’ Are Wearing Down Outmanned and Outgunned Ukrainian Forces,” CNN , 23 January 2024.
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• “Ep 106: John McManus on the U.S. Army’s Pacific War,” School of War [podcast], 16 January 2024.

The views and opinions of our authors do not necessarily reflect those of the Association of the United States Army. An article selected for publication represents research by the author(s) which, in the opinion of the Association, will contribute to the discussion of a particular defense or national security issue. These articles should not be taken to represent the views of the Department of the Army, the Department of Defense, the United States government, the Association of the United States Army or its members.

EXPLAINER: Why Did Russia Invade Ukraine?

Experts say the cause of the military conflict can be tied to a complicated history, Russia’s tensions with NATO and the ambitions of Vladimir Putin.

Why Russia Invaded Ukraine

ARIS MESSINIS | AFP via Getty Images

A man sits outside his destroyed building after bombings on the eastern Ukraine town of Chuguiv, on Feb. 24, 2022.

Predictions of a full-scale Russian invasion of Ukraine came true in the early morning hours of Feb. 24, 2022.

Russia had amassed up to 190,000 troops – according to reports from the U.S. – on Ukraine’s borders over the course of many months. The buildup of forces around Russia's neighbor and former Soviet Union state started in late 2021 and escalated in early 2022.

Prior to the invasion, Russian President Vladimir Putin recognized the Russian-backed breakaway regions of Donetsk and Luhansk, both located in the disputed Donbas area, as “independent” people’s republics and ordered so-called “peacekeeping” troops into those areas.

What started as a concerning situation with hopes for dialogue and diplomacy then evolved into what the Ukrainian foreign minister described as the “most blatant act of aggression in Europe since” World War II.

While the invasion took some leaders by surprise, experts do have insight on the origins of the conflict. They say the roots of the tension can be tied to some combination of the complicated history between the two countries, Russia’s ongoing tensions with NATO and the ambitions of one man: Putin.

What Is the History Between Ukraine and Russia?

Russia and Ukraine have what either side might describe as a common or complicated legacy that dates back a thousand years. In the last century, Ukraine, known as the breadbasket of Europe, was one of the most populous and powerful republics in the former USSR as well as an agricultural engine until it declared independence in 1991, according to the Council on Foreign Relations . But Russia has kept a close eye on its neighbor to the West, while Ukrainians have found their independence to be tumultuous at times, with periods of protests and government corruption.

Ukraine’s ambitions to align itself more with Western countries – including its publicly stated interest in joining NATO , which itself was founded at least in part to deter Soviet expansion – has been met with aggression from Russia, the council notes. Tensions came to a head in 2014 after Ukrainians ousted a Russia-aligned president. Russia – under the dubious claim of protecting ethnic Russians and Russian-speakers from Ukrainian persecution – annexed the Crimea region of Ukraine in a move widely condemned by the international community.

At about the same time, Russia fomented dissension in the Donbas area of eastern Ukraine, backing a separatist movement in the regions of Donetsk and Luhansk that resulted in armed conflict. The regions declared independence as both sides dug in for a protracted standoff. The conflict between the two countries has persisted since, with at least 14,000 people dying, according to the council.

When Did the Current Conflict Between Russia and Ukraine Begin?

Russia started growing its military presence around Ukraine – including in Belarus, a close Russia ally to the north of Ukraine – in late 2021 under various pretenses while remaining vague on its intentions. By December of that year, tens of thousands of Russian troops were hovering on the border, virtually surrounding the country and stoking tensions that led to a call between Putin and U.S. President Joe Biden.

Russia Invades Ukraine: A Timeline

Fears escalated in early 2022 as the number of Russian forces surrounding Ukraine increased. Biden and Putin talked again , U.N. Security Council sessions were called to address the crisis, and numerous leaders from NATO, the U.S. and other countries called on Russia to de-escalate or face retaliation in some form. The most recent estimates – prior to the invasion – put the number of Russian troops on the border at close to 200,000.

What Does Russia Want When it Comes to Ukraine?

A principal demand of Russia is to prevent Ukraine from joining NATO , a military alliance between 29 European countries and two North American countries dedicated to preserving peace and security in the North Atlantic area. Ukraine is one of just a few countries in Eastern Europe that aren’t members of the alliance. The Kremlin in general views NATO expansion as a “fundamental concern,” according to a translated readout of a Jan. 28, 2022, call between Putin and French President Emmanuel Macron.

It’s noteworthy, however, that NATO likely has “no intention right now” to admit Ukraine to the organization, says William Pomeranz, the acting director of the Kennan Institute at the Wilson Center, a non-partisan policy forum for global issues.

“I think NATO, and the invitation for Ukraine to join NATO at some point in the future, is simply just a pretext to potentially invade Ukraine,” he says, referring to Russia. “Ukraine is not a member of NATO, it doesn't have any of the NATO guarantees, and so there is no hint that Ukraine will become a member of NATO soon.”

Putin, specifically, does not want Ukraine to join NATO “not because he has some principled disagreement related to the rule of law or something, it's because he has a might makes right model,” adds Bradley Bowman, the senior director of the Center on Military and Political Power at the Foundation for Defense of Democracies, a non-partisan research institute focused on national security and foreign policy.

“He believes, ‘Hey, Ukraine, I'm more powerful than you, and because I'm more powerful than you, Ukraine, I can tell you what to do and with whom to associate,’” Bowman says.

Beyond the concern around NATO and other demands related to weapons and transparency, Russia’s nature of expansion is also at play when it comes to Ukraine. Some Russians, Putin included, remain aggrieved by the collapse of the USSR, and feel Russia has a claim to the former Soviet republic.

“The imperialistic policy of the Russian Federation requires from us and all the allies complex activities and complex deterrence and defense,” U.S. Secretary of Defense Lloyd Austin said during a Feb. 18, 2022, news conference .

What Does Vladimir Putin Want Out of Ukraine?

The demands of the Russian government are inseparable from those of its authoritarian leader. While analysts are quick to say that they cannot read Putin’s mind – Biden himself admitted as much during remarks on Feb. 18, 2022 – they note his broad ambitions, particularly those tied to his nostalgia for the territorial integrity of the USSR, that have been made clear by his actions.

“We know that Putin views the collapse of the Soviet Union as a disaster,” Bowman says. “We know he resents the success of NATO. We know that he genuinely reviles the expansion of NATO eastward. We know that he has an eye on history, he's getting older, he is mindful of how he's going to look in history books and he sees himself as kind of a neo-czar who would like to reconstitute as much of the Soviet Union as possible.”

Ukraine, in particular, is a “critical element” of this ambition, Bowman adds. Putin has a history of invading and occupying countries that approach NATO membership. Russian armies invaded the former Soviet state of Georgia in 2008 as that country was pursuing membership in the alliance. They briefly pressured the capital Tbilisi before withdrawing to separatist regions they still occupy today. The 2014 Crimea annexation is another example, Bowman notes, and Putin said on Feb. 22, 2022 , that he wants the world to recognize that territory as rightfully Russian. He rationalized in a 2021 essay that a common history and culture – which Ukrainians dispute – entitled Russia to exert its influence there.

“I think Ukraine has always been a sore spot for Vladimir Putin,” Pomeranz says. “He does not recognize its independence and its right to be a country, as he noted in his long article on Ukraine, where he said that, basically, Ukraine and Russia are one people in one country. There is this long-felt resentment about Ukrainian independence and the fact that the Soviet Union just let Ukraine go away, as it were. So I think he wants to end that independence.”

The Russian president, however, might not have predicted the type of strong response from the international community he saw to the buildup on the Ukraine border. Bowman says because of this, Putin “is the most persuasive billboard possible for the value of NATO membership.”

“What we’ve seen from President Putin is basically to precipitate everything he says he wants to prevent,” Secretary of State Antony Blinken said during a Feb. 16, 2022, “Morning Joe” appearance on MSNBC. “He says he wants NATO further away from Russia. NATO has only gotten more united, more solidified as a result of the threat of Russian aggression, and of course, for defensive reasons, is moving more forces closer to Russia.”

Why Did Russia Invade Ukraine When it Did?

It all could have come down to Russia’s resources at that moment, Pomeranz says. It might have been the “most opportune time” from Putin’s perspective, he adds, because the country had $600 billion in foreign currency reserves and had already put significant resources into reconstructing Russia’s army.

“I think Vladimir Putin thinks this is the best time for him to right what he perceives as a great wrong and reverse Ukrainian independence and sovereignty,” says Pomeranz of the Wilson Center.

Putin likely also viewed the West – including the U.S., specifically – as weak, Pomeranz adds, which could have impacted how much help he thought Ukraine would actually get. Bowman echoes this sentiment and points to how the U.S. handled pulling troops out of Afghanistan in August.

“I don't know how he could have read that as anything other than American weakness,” says Bowman, who served as an adviser to Republican senators for years. “I think he wondered whether, frankly, the Biden administration would be as weak as the Obama administration was in dealing with aggression toward Ukraine.”

Biden administration officials would beg to differ on the U.S. response. Blinken, during a Feb. 23, 2022, appearance on “CBS Evening News” prior to reports of the invasion, said further Russian aggression in Ukraine would lead to “a price that Vladimir Putin and Russia will pay for a long, long time.”

“We’re not standing by and watching,” Blinken said. “To the contrary, we’ve spent months building with allies and partners these very significant consequences for Russia.”

Other reasons for action at the time could have been at play for Putin. A combination of factors – from the impact of the COVID-19 pandemic to Ukrainian President Volodymyr Zelenskyy’s lack of political experience – led to somewhat of a “perfect storm” for the Russian leader to act when he did, says Kimberly St. Julian-Varnon, a presidential doctoral fellow at the University of Pennsylvania.

“I think it's his magnum opus,” she says. “I think this is his crowning achievement of whatever Putinism is.”

How Have the U.S. and Other Countries Responded to Russia’s Invasion?

The response was swift at the outset. The North Atlantic Council, the political decision-making arm of NATO, held an emergency meeting on Feb. 24, 2022, at which it activated its defense plans, which include the NATO Response Force. Biden had said before Russia’s attack that he would be sending more U.S. troops to Eastern Europe to defend NATO allies such as Poland but has repeatedly stated he will not be sending U.S. troops into Ukraine.

Some countries had already responded to Putin’s actions related to the Donbas, which the U.S. called the “beginning of an invasion.”

Biden on Feb. 22, 2022, announced a series of sanctions against Russian financial institutions and the country’s elites. That followed an executive order he issued prohibiting new investment, trade and financing by U.S. persons to, from or in Donetsk and Luhansk. Former U.K. Prime Minister Boris Johnson announced his own country’s sanctions that day, targeted against Russian banks and billionaires, the BBC reported .

The U.S. president also ordered sanctions against the Russian-built Nord Stream 2 natural gas pipeline company and its corporate officers on Feb. 23, 2022, prior to the invasion. The controversial project, which runs from Russia through Europe, is not yet online but is pivotal to both Moscow and Western Europe, which is becoming increasingly dependent on Russian supply to fulfill its growing energy needs. German Chancellor Olaf Scholz had already said before Biden’s sanctions announcement that his country would halt certification of the pipeline due to Russia’s actions. In late 2022, there were explosions at the pipeline under mysterious circumstances .

Biden promised in a statement late on Feb. 23 of that year that he would announce “further consequences the United States and our Allies and partners will impose on Russia for this needless act of aggression against Ukraine and global peace and security.”

That promise was kept. Since the war began, the U.S. has imposed thousands of different sanctions on Russia, according to a tally kept by the Atlantic Council that was last updated in November 2023. And that doesn’t include the 500 new sanctions announced by the U.S. government on Feb. 23, 2024.

Punishments have focused on, for example, Russian oil and gas imports and Russian banks. Many countries, such as Canada, the U.K. and others in Europe, have followed suit. The European Union has also imposed its own sanctions, targeting Russian individuals – including Putin himself – and energy. Countries have also committed about $278 billion in aid to Ukraine collectively, as of Jan. 15, 2024.

Two years in, the sanctions have inflicted some financial pain on Russia but haven’t done much to hinder economic growth. The International Monetary Fund in January 2024 projected Russia’s real GDP to grow 2.6% in 2024, which was up from the 1.1% projection just months prior.

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PUBLICATIONS

Through its publications, INSS aims to provide expert insights, cutting-edge research, and innovative solutions that contribute to shaping the national security discourse and preparing the next generation of leaders in the field.

Publications

Russia's war in ukraine: identity, history, and conflict.

By Jeffrey Mankoff CSIS

Russia’s invasion of Ukraine constitutes the biggest threat to peace and security in Europe since the end of the Cold War. On February 21, 2022, Russian president Vladimir Putin gave a bizarre and at times unhinged  speech  laying out a long list of grievances as justification for the “special military operation” announced the following day. While these grievances included the long-simmering dispute over the expansion of the North Atlantic Treaty Organization (NATO) and the shape of the post–Cold War security architecture in Europe, the speech centered on a much more fundamental issue: the legitimacy of Ukrainian identity and statehood themselves. It reflected a worldview Putin had long expressed, emphasizing the deep-seated unity among the Eastern Slavs—Russians, Ukrainians, and Belarusians, who all trace their origins to the medieval Kyivan Rus commonwealth—and suggesting that the modern states of Russia, Ukraine, and Belarus should share a political destiny both today and in the future. The corollary to that view is the claim that distinct Ukrainian and Belarusian identities are the product of foreign manipulation and that, today, the West is following in the footsteps of Russia’s imperial rivals in using Ukraine (and Belarus) as part of an “ anti-Russia project .”

Throughout Putin’s time in office, Moscow has pursued a policy toward Ukraine and Belarus predicated on the assumption that their respective national identities are artificial—and therefore fragile. Putin’s arguments about foreign enemies promoting Ukrainian (and, in a more diffuse way, Belarusian) identity as part of a geopolitical struggle against Russia echo the way many of his predecessors refused to accept the agency of ordinary people seeking autonomy from tsarist or Soviet domination. The  historically minded Putin  often invokes the ideas of thinkers emphasizing the organic unity of the Russian Empire and its people—especially its Slavic, Orthodox core—in a form of what the historian  Timothy Snyder  calls the “politics of eternity,” the belief in an unchanging historical essence.

The salience that Putin and other Russian elites assign to the idea of Russian-Ukrainian-Belarusian unity helps explain the origins of the current conflict, notably why Moscow was willing to risk a large-scale war on its borders when neither Ukraine nor NATO posed any military threat. It also suggests that Moscow’s ambitions extend beyond preventing Ukrainian NATO membership and encompass a more thorough aspiration to dominate Ukraine politically, militarily, and economically.

Read the rest of the report at CSIS - 

Jeffrey Mankoff  is a Distinguished Research Fellow at the Institute for National Strategic Studies, Center for Strategic Research at National Defense University. 

The views expressed are the authors own and do not reflect those of the National Defense University, the Department of Defense, or the U.S. Government. 

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Ukraine invasion — explained

The roots of Russia's invasion of Ukraine go back decades and run deep. The current conflict is more than one country fighting to take over another; it is — in the words of one U.S. official — a shift in "the world order." Here are some helpful stories to make sense of it all.

The ripple effects of Russia's war in Ukraine continue to change the world

Scott Neuman

Alyson Hurt

A year after Russia's invasion of Ukraine sparked the largest conflict in Europe since World War II, the repercussions continue to reverberate around the world. Not only has the war in Ukraine set off a geopolitical realignment, but it has caused economic hardship far from the epicenter of the fighting.

The Feb. 24, 2022, invasion has touched off a refugee crisis, as Ukrainians flee the conflict in their homeland and many Russian men seek to avoid conscription. Meanwhile, it has spurred a process toward expanding NATO, with Finland and Sweden pursuing membership after decades of official neutrality.

Ukraine and Russia are key exporters of wheat, barley, corn and cooking oil, particularly to African and Middle Eastern countries. Turkey and the United Nations brokered a deal last summer to allow Ukrainian grain to pass through Black Sea ports, but Russia is reportedly still hindering shipments . Russia is also a major producer of fertilizer and petroleum. Disruptions to the flow of these goods are compounding other supply chain and climate challenges, driving up food and gas prices and causing shortages in places such as Chad , Tunisia and Sri Lanka .

More than 8 million refugees have fled Ukraine in what the World Health Organization describes as "the largest movement of people in the European Region since the Second World War." Many have been involuntarily relocated by Russia. Others have put a strain on resources, as well as schools and hospitals, in Poland and Germany .

A 21st century war in Europe — led by a nuclear power — is pushing the world toward realignment. It has rattled NATO, the European Union and the U.N ., forcing countries to take sides in ways that have led to escalating tensions and diplomatic shifts. For example, Turkey , despite being a NATO member, has increased trade with Russia since the start of the war and has thrown up objections to allowing Sweden and Finland into the alliance.

Russia is one of the world's largest producers of oil and fuel. European countries have banned the Russian oil, gas and diesel they relied on, which initially caused a steep spike in prices. However, moves by European nations to lock in alternative sources , along with conservation efforts and a mild winter, have largely alleviated those price hikes. Now prices have returned to pre-invasion levels.

Russia has more nuclear weapons than any other country. Its attack on Ukraine has notably reenergized NATO, with the U.S. and other member states funneling tens of billions of dollars worth of military equipment into Ukraine. Early weapons deliveries included anti-tank rockets such as the U.S.-made Javelin. In the latest moves, the U.S ., Germany and Britain have promised to provide state-of-the-art tanks.

NPR's Will Chase, Alex Leff, Pam Webster, Desiree F. Hicks and Nishant Dahiya contributed to this report. The text and graphics build on previous work by Alina Selyukh, Connie Hanzhang Jin and Nick Underwood.

• Russia-Ukraine war

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Russia’s war in Ukraine, explained

Putin’s invasion in February began Europe’s first major war in decades.

by Jen Kirby and Jonathan Guyer

Russia is bombarding major cities in Ukraine, more than a week into a war where Moscow has faced setbacks on the battlefield — yet seems undeterred from its campaign to take Ukraine.

Get in-depth coverage about Russia’s war on Ukraine.

Why Ukraine?

Learn the history behind the conflict and what Russian President Vladimir Putin has said about his war aims .

The stakes of Putin’s war

Russia’s invasion has the potential to set up a clash of nuclear world powers . It’s destabilizing the region and terrorizing Ukrainian citizens . It could also impact inflation , gas prices , and the global economy.

How other countries are responding

The US and its European allies have responded to Putin’s aggression with unprecedented sanctions , but have no plans to send troops to Ukraine , for good reason .

How to help

Where to donate if you want to assist refugees and people in Ukraine.

On March 4, Russia seized Zaporizhzhia , one of Europe’s largest nuclear power plants. Russian shelling of the southeastern Ukraine facility set off a fire , which Ukrainian officials warned could set off a nuclear disaster. It took hours, but the fire was extinguished, and international monitors said that they do not detect elevated radiation levels and that the fire did not damage “essential” equipment. US officials have said Russia now appears to be in control of the plant.

But the incident was a reminder of how dangerous this war in Ukraine is becoming, and how uncertain and confusing things still are on the ground. Russian troops were advancing toward Kyiv, and thousands and thousands are fleeing in advance of a possible siege on the city.

The Russian military has made advances in the south, and are gaining in the area of Kherson, a port city on the Black Sea whose control is reportedly contested , and Mariupol, on the Sea of Azov. Russian bombardment of these cities has resulted in humanitarian issues , with bridges and roads damaged by the fighting and dwindling access to food, clean water, medicine, and electricity in certain areas. Kharkiv, Ukraine’s second-largest city, experienced heavy Russian fire this week, and strikes have heavily damaged residential areas .

Ukrainian and Russian officials met in early March, and tentatively agreed on the need to humanitarian corridors — basically, safe zones for civilians to flee and supplies to pass through — but did not reach agreements on a larger ceasefire. As of March 6, multiple attempts to evacuate Ukrainian civilians have been halted because of Russian shelling.

Putin’s attempt to redraw the map of Europe risks becoming the most devastating conflict on the continent since World War II. Already, it is causing an astounding humanitarian crisis: Hundreds, perhaps thousands , of civilians have died, and more than 1.5 million people have fled the violence so far, according to the United Nations High Commissioner for Refugees, making it the fastest-growing refugee crisis in Europe since World War II.

The battle for Ukraine began in the early morning hours, local time, on February 24, when Russian President Vladimir Putin launched what he called a “special military operation” into the country of about 40 million. He claimed the Russian military seeks “demilitarization and denazification” but not occupation; attacks shortly followed from multiple fronts and targeted toward multiple cities.

Ukraine’s resistance has complicated Russia’s efforts to seize the country. Russian forces have not made the progress they likely thought they would at the start of the campaign. The Russian military’s early strategy has perplexed some experts and observers . But the more protracted this war becomes, the more catastrophic it will be.

The United States and its allies in Europe and the United Kingdom imposed the toughest financial sanctions ever on Russia after the first incursion, and have only built on these penalties since. On February 26, the United States and European countries agreed to block some Russian banks from SWIFT, a global messaging system, which will essentially prevent those institutions from doing any global transactions, a punishment that allies had previously hesitated to pursue . Already, Russia’s economy is reeling from the impact of these penalties .

This sustained international pressure, and Ukraine’s resistance, may still not be enough to force Russia to end its military campaign. That leaves Ukraine — and the world — in a perilous and unpredictable moment.

Ukraine is under siege

After months of Putin building up tens of thousands of troops near the Ukrainian border and a series of failed diplomatic talks, Russia is now waging a full-out war on Ukraine.

Tensions escalated quickly when, on February 21, Putin delivered an hour-long combative speech that essentially denied Ukrainian statehood . He recognized the independence of two breakaway regions in eastern Ukraine where Moscow has backed a separatist rebellion since 2014 and sent so-called peacekeeping forces into the region. As experts said , that was likely just the beginning, setting the stage for a much larger conflict.

Days later, that larger conflict materialized. On February 24, Putin announced he was launching an assault “to defend people who for eight years are suffering persecution and genocide by the Kyiv regime,” a reference to a false claim about the government in Ukraine. He demanded Ukraine lay down its weapons or be “ responsible for bloodshed .”

Soon after Putin’s speech, reports emerged of explosions around cities, including Kharkiv in eastern Ukraine and the capital Kyiv . The Ukrainian foreign minister called it “a full-scale invasion of Ukraine.” By the afternoon in Ukraine, Russian troops and tanks had entered the country on three fronts : from Belarus in the north, from the east of Ukraine, and from the south.

The Russian military has targeted critical infrastructure, like airports, with airstrikes and has launched more than 400 missiles , as of March 1. As a senior US defense official said on February 26, “There’s no doubt in our mind that civilian infrastructure and civilian areas are being hit as a result of these barrages.”

The main battlefronts are in Kyiv’s outskirts; in southern Ukraine, including the major city of Mariupol; and in eastern Ukraine around Kharkiv, the country’s second-largest city.

“They had maximal war aims,” Michael Kofman, research director in the Russia studies program at CNA, said in an interview posted on Twitter on February 25. “They had a military operation that’s now in progress, first to try to achieve regime change, encircle the capital, and try to overthrow the Ukrainian government, and then a much larger set of pincer movements to encircle and envelope Ukrainian forces. Try to do this quickly and force surrender of isolated pockets.”

But the Russian army has not been able to completely roll over Ukrainian forces, and some analysts have suggested Moscow may have been surprised at Ukraine’s resistance. Pentagon officials said that, as of March 4, Russia has committed about 92 percent of its combat power so far. Ukraine’s airspace remains contested.

Samuel Charap, a senior political scientist at RAND Corporation, told a panel of reporters on February 28 that Russia’s military performance has been odd. “In other words, some of the things that I would have expected — like the air force taking a major role — have not happened.”

“Seems to me there was a lot of war optimism and a sense that the [Ukrainian] government would fall with just a little push,” Charap continued. “And that didn’t happen. I wouldn’t read too much into that about the ultimate course of the war, though. This is still a situation where the deck unfortunately is stacked against the Ukrainians, despite their bravery.”

Putin himself has called on the Ukrainian army to “take power into their own hands and overthrow” Ukrainian President Volodymyr Zelenskyy, a sign that Putin remains focused on regime change. “According to the available intelligence, the enemy marked me as a target No. 1 and my family as the target No. 2,” said Zelenskyy, speaking on the night of February 24.

Efforts to stop the fighting have so far failed. On February 28, high-level officials from Russia and Ukraine met at the Ukraine-Belarus border, and again on March 3. Russia has continued to insist that a ceasefire requires “demilitarization” and neutrality for Ukraine, but Ukraine has only continued to push for more military aid and ascension into Western bodies like the EU, even signing an EU membership application amid the fighting .

Both Ukraine and Russia have suggested they will hold another round of talks in coming days. Across conflicts, there is usually a severe escalation in fighting before ceasefires, as everyone attempts to maximize their leverage. “I think that they want to inflict maximum damage to pressure the Ukrainian government to seek some sort of ceasefire that is effectively a surrender,” said Margarita Konaev, associate director of analysis and research fellow at Georgetown’s Center for Security and Emerging Technology.

The toll of this young conflict is growing. The UN has said that, as of March 6, more than 350 civilians have been confirmed killed and hundreds more have been wounded; Ukraine’s emergency services puts the civilian death toll at 2,000 people as of March 2 . Ukrainian officials have said about 11,000 Russian troops have been killed in the fighting, as of March 6, but American and European estimates of Russian casualties have been substantially lower . The Russian government has reported nearly 500 soldier deaths . Experts said all these statistics should be treated with a great deal of caution because of the fog of war and the incentives both Russia and Ukraine have to push a particular narrative.

• Why is Putin attacking Ukraine? He told us.

Ukrainian officials have also accused Russia of war crimes after reports of a shelling of an orphanage and kindergarten outside of Kyiv . Across Ukraine, thousands of civilians of all ages are enlisting to fight . Ukrainian officials called on residents to “make Molotov cocktails” to defend against the invasion. More than 1.5 million Ukrainians have fled to neighboring countries like Poland since the conflict began, according to a United Nations estimate .

The roots of the current crisis grew from the breakup of the Soviet Union

Russia’s invasion contravenes security agreements the Soviet Union made upon its breakup in the early ’90s. At the time, Ukraine, a former Soviet republic, had the third-largest atomic arsenal in the world. The US and Russia worked with Ukraine to denuclearize the country, and in a series of diplomatic agreements , Kyiv gave its hundreds of nuclear warheads back to Russia in exchange for security assurances that protected it from a potential Russian attack.

But the very premise of a post-Soviet Europe is helping to fuel today’s conflict. Putin has been fixated on reclaiming some semblance of empire, lost with the fall of the Soviet Union. Ukraine is central to this vision. Putin has said Ukrainians and Russians “ were one people — a single whole ,” or at least would be if not for the meddling from outside forces (as in, the West) that has created a “wall” between the two.

• “It’s not about Russia. It’s about Putin”: An expert explains Putin’s endgame in Ukraine

Last year, Russia presented the US with a list of demands , some of which were nonstarters for the United States and its allies in the North Atlantic Treaty Organization (NATO). Putin demanded that NATO stop its eastward expansion and deny membership to Ukraine, and also made other demands for “security guarantees” around NATO.

The prospect of Ukraine and Georgia joining NATO has antagonized Putin at least since President George W. Bush expressed support for the idea in 2008. “That was a real mistake,” Steven Pifer, who from 1998 to 2000 was ambassador to Ukraine under President Bill Clinton, told Vox in January. “It drove the Russians nuts. It created expectations in Ukraine and Georgia, which then were never met. And so that just made that whole issue of enlargement a complicated one.”

Ukraine is the fourth-largest recipient of military funding from the US, and the intelligence cooperation between the two countries has deepened in response to threats from Russia. But Ukraine isn’t joining NATO in the near future, and President Joe Biden has said as much. Still, Moscow’s demand was largely seen as a nonstarter by the West, as NATO’s open-door policy says sovereign countries can choose their own security alliances.

Though Putin has continued to tout the threat of NATO, his speech on February 21 showed that his obsession with Ukraine goes far beyond that. He does not see the government in Ukraine as legitimate.

“Ukraine is not just a neighboring country for us. It is an inalienable part of our own history, culture and spiritual space,” he said, per the Kremlin’s official translation . “Since time immemorial, the people living in the south-west of what has historically been Russian land have called themselves Russians.”

The two countries do have historical and cultural ties, but as Vox’s Zack Beauchamp explained , Putin’s “basic claim — that there is no historical Ukrainian nation worthy of present-day sovereignty — is demonstrably false .”

As experts noted, it is difficult to square Putin’s speech — plus a 2021 essay he penned and other statements he’s made — with any realistic diplomatic outcome to avert conflict. It was, essentially, a confession that this wasn’t really about NATO, said Dan Baer, the acting director of the Europe program at the Carnegie Endowment for International Peace and a former ambassador to the Organization for Security and Cooperation in Europe. “It was about that he doesn’t think Ukraine has a right to exist as a free country,” he said before Putin’s escalation on the night of February 23.

This is the culmination of eight years of tensions

This isn’t the first time Russia has attacked Ukraine. In 2014, Russia annexed the Crimean Peninsula, invaded eastern Ukraine, and backed Russian separatists in the eastern Donbas region. That conflict has killed more than 14,000 people to date .

Russia’s assault grew out of mass protests in Ukraine that toppled the country’s pro-Russian President Viktor Yanukovych, which began over his abandonment of a trade agreement with the European Union. US diplomats visited the demonstrations, in symbolic gestures that further agitated Putin.

President Barack Obama, hesitant to escalate tensions with Russia any further, was slow to mobilize a diplomatic response in Europe and did not immediately provide Ukrainians with offensive weapons.

“A lot of us were really appalled that not more was done for the violation of that [post-Soviet] agreement,” said Ian Kelly, a career diplomat who served as ambassador to Georgia from 2015 to 2018. “It just basically showed that if you have nuclear weapons” — as Russia does — “you’re inoculated against strong measures by the international community.”

Since then, corruption has persisted in the Ukrainian government, and the country ranks in the bottom third of the watchdog group Transparency International ’s index.

Ukraine’s far-right presence has grown and become somewhat normalized, and there are government-aligned fascist militias in the country. But Moscow has drawn out those issues to advance false claims about genocide and other attacks on civilians as a way to legitimize the separatist movement in eastern Ukraine and to create a pretext for invasion. In his prerecorded speech shared on the eve of the bombardment of Ukraine, Putin said he sought the “ denazification ” of Ukraine.

To be clear: The Ukrainian government is not a Nazi regime and has not been co-opted by the far right. Zelenskyy is Jewish; he speaks proudly of how his Jewish grandfather fought against Hitler’s army .

Yet, days earlier, Putin used these sorts of claims as part of his explanation for recognizing as independent the so-called Luhansk People’s Republic and the Donetsk People’s Republic, the two territories in eastern Ukraine where he has backed separatists since 2014. “Announcing the decisions taken today, I am confident in the support of the citizens of Russia. Of all the patriotic forces of the country,” Putin said before moving troops into the regions for “peacekeeping” purposes.

At the time, most experts Vox spoke to said that looked like the beginning, not the end, of Russia’s incursion into Ukraine.

“In Russia, [it] provides the political-legal basis for the formal introduction of Russian forces, which they’ve already decided to do,” Kofman, of CNA, told Vox on February 21 . “Secondarily, it provides the legal local basis for Russian use of force in defense of these independent republics’ Russian citizens there. It’s basically political theater.”

It set “the stage for the next steps,” he added. Those next steps are now clear.

How the rest of the world is responding

The United States and its allies around the world have condemned Russia’s invasion of Ukraine, and have since announced increasingly tough sanctions, intended to completely isolate Russia from the international community and inflict real economic costs.

Biden announced on the afternoon of February 24 that the United States would impose sanctions on Russian financial institutions, including cutting off Russia’s largest banks from the US financial system, and on Russian elites in Putin’s inner circle. America will also implement export controls on certain technologies . The United Kingdom and Europe added their own sanctions, imposing the “ massive ” penalties the West had been warning Putin about.

The US and its allies have only amped up the pressure since then. On February 25, the EU and US imposed sanctions on Putin himself . On February 26, the US and European countries announced an agreement to cut some (but not all) Russian banks off from SWIFT, the global messaging system that enables most international transactions, which will make it very difficult for Russia to make transactions beyond its borders. (Japan also signed on to SWIFT actions on February 27.) The US and its allies have said they will target Russia’s central bank , specifically its foreign reserves that Moscow needs to help support its currency. The US has continued to add penalties, including joining other countries in closing US airspace to Russian aircraft , and sanctioning more than a dozen oligarchs.

The United States has said it will not involve troops in any Ukrainian conflict, though more US military aid to Ukraine is on its way and the US has shored up its presence on NATO’s eastern flank. On February 24, the Pentagon said it would send 7,000 additional troops to Germany , and Secretary of State Antony Blinken said on February 26 that he was authorizing “up to $350 million” in additional military aid to Ukraine, including “further lethal defensive assistance to help Ukraine address the armored, airborne, and other threats it is now facing.”

Such aid, according to a February 26 tweet by State Department spokesperson Ned Price, will be provided “immediately” and include “anti-tank and air defense capabilities.” Other European and NATO countries are also stepping up their assistance, including Germany , which reversed a long-standing policy of not sending lethal aid to conflict zones.

• How to punish Russia for Ukraine

Russia knows that the US and its partners do not want to commit themselves militarily, and, as Putin launched his invasion, he offered an ominous warning as he touted Russia’s nuclear arsenal : “There should be no doubt that any potential aggressor will face defeat and ominous consequences should it directly attack our country.” On February 27, Putin escalated that threat by putting the country’s nuclear deterrent forces on high alert .

NATO has vowed to protect its members from any Russian aggression. On February 25, NATO announced that it was activating part of its NATO Response Force — a 40,000-troop unit modernized after the 2014 Crimea invasion — to protect allies on NATO’s eastern flank. “We are now deploying the NATO Response Force for the first time in a collective defense context. We speak about thousands of troops. We speak about air and maritime capabilities,” NATO Secretary-General Jens Stoltenberg said .

Yet these are largely defensive measures, which means most of the punishment against Russia will come in the form of economic sanctions. Still, the West is starting to shift from an original hesitancy to impose the most severe costs on Russia over fears of what it might mean for Europe, the US, and the rest of the global economy — and what Russia might do to retaliate.

They’re not all the way there, however. For example, even the SWIFT action is expected to leave some carve-outs so Russia can still export gas to Europe . The tougher the sanctions on Russia, the harder it will hit the US and especially European economies, so leaders are still trying to soften the impact. But the fallout from these punishments — along with other measures, like the EU and United States barring Russia from their airspace — is being felt in Russia, as the ruble crashes and analysts warn of a deep recession .

• Prepare for higher gas prices thanks to Russia — and more inflation

A way out of this war is difficult to contemplate as bombs are falling on Ukraine, but the US and its allies are going to have to do careful diplomacy to isolate and put pressure on Russia in the long term — and create incentives for Moscow to stop its assault on Ukraine . The US and its allies are also likely going to have to decide how much they want, or can, support Ukraine as it battles Russia.

“The real question, I think, is going to come down to what extent the West can and will try to support and supply a long-term insurgency against Russia,” said Paul D’Anieri, an expert on Eastern European and post-Soviet politics at the University of California Riverside. “And what level of success does Russia have in fighting back against? Unfortunately, it seems like the best strategy for peace right now is when enough Russians die, that the Russians decide it’s not worth it anymore.”

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