Theoria · Events

Russia's Full-Scale Invasion of Ukraine

2022-2023

Russia launched a full-scale invasion of Ukraine on February 24, 2022 from several directions after recognizing separatist entities and massing forces. Ukraine prevented the capture of Kyiv, while Russian forces occupied substantial southern and eastern territory. Western states supplied weapons and imposed sanctions. Ukrainian counteroffensives recovered territory, but the war became attritional and created mass death, destruction, and displacement.

Explore this event on the interactive map ✦

The Event

Russia annexed Crimea and supported armed separatism in the Donbas from 2014. The Minsk agreements failed to produce a durable settlement. In 2021-2022 Russia concentrated forces and demanded a wider European security revision while denying plans to invade.

The invasion shattered European security assumptions, expanded NATO, accelerated military spending and energy diversification, and generated unprecedented sanctions and support for Ukraine. It also produced global food and energy shocks, alleged war crimes, nuclear risk, and an unresolved confrontation extending beyond the 2023 timeline represented here.

Key Moments

  1. Russia Recognizes Separatist EntitiesFebruary 21, 2022

    Russia recognized the self-proclaimed Donetsk and Luhansk people's republics and ordered forces into their claimed territory. The step repudiated the Minsk framework.

  2. Full-Scale Invasion BeginsFebruary 24, 2022

    Russian forces attacked Ukraine from Russia, Byelarus, occupied Crimea, and the Donbas. Missile strikes hit targets across the country while ground columns advanced toward Kyiv, Kharkiv, and the south.

  3. Battle of Kyiv Repels RussiaApril 2, 2022

    Russian forces withdrew from the Kyiv region after failed advances and heavy fighting. Ukrainian authorities reentered towns where mass graves and evidence of killings, including in Bucha, were documented.

  4. Mariupol FallsMay 20, 2022

    The last Ukrainian defenders at the Azovstal steel plant surrendered after a prolonged siege. Much of Mariupol had been destroyed, and civilian deaths remained difficult to establish.

  5. EU Grants Ukraine Candidate StatusJune 23, 2022

    European Union leaders granted candidate status to Ukraine and Moldova. The decision linked wartime support to a long-term political and institutional orientation toward Europe.

  6. Kharkiv CounteroffensiveSeptember 6, 2022

    Ukrainian forces broke through thin Russian lines in Kharkiv region and rapidly liberated a large area. Russia withdrew from the key logistics center of Izium.

  7. Russia Declares Four AnnexationsSeptember 30, 2022

    Russia declared the annexation of Donetsk, Luhansk, Zaporizhzhia, and Kherson regions after referendums conducted under occupation. Ukraine and most governments rejected the claims.

  8. War Becomes AttritionalDecember 2023

    After Ukraine's 2023 counteroffensive made limited gains, both sides expanded minefields, trenches, drones, artillery, and long-range strikes. The front stabilized without a negotiated settlement.

Through the Lenses of International Relations Theory

Realism

Russia Recognizes Separatist Entities

Recognition of the two entities created a legal pretext for sending forces to defend them, and it discarded eight years of the Minsk framework in an afternoon. The step was preparation rather than policy, taken three days before the invasion it was designed to justify.

Full-Scale Invasion Begins

The largest interstate invasion in Europe since 1945 was launched on the assumption that the government would collapse within days. It rested on a catastrophic assessment of Ukrainian cohesion, produced by an intelligence system that had learned to report what was wanted.

Battle of Kyiv Repels Russia

Russian forces withdrew from the north after failing to take the capital, ending the attempt at regime change and converting the war into a territorial one. The objective changed because the original one had proved unattainable, not because anyone chose a new strategy.

Mariupol Falls

The city was destroyed and taken after a three-month siege that secured the land corridor to Crimea, which was among Russia's few clear strategic gains. The objective was achieved and the cost, in a city of four hundred thousand, was regarded as acceptable.

EU Grants Ukraine Candidate Status

Membership candidacy was granted in four months to a country at war, a process that has taken other applicants a decade to begin. The decision was strategic rather than procedural, and everyone involved described it that way.

Kharkiv Counteroffensive

Ukrainian forces broke a thinly held line and advanced further in a week than Russia had in five months. The operation demonstrated that the front was not static by nature and that concentration against weakness still produces breakthroughs.

Russia Declares Four Annexations

Four regions were annexed including territory Russian forces did not control, and one of them was partly lost within days. Annexing ground you do not hold is a commitment device rather than a claim, intended to make withdrawal politically impossible.

War Becomes Attritional

After the 2023 counteroffensive failed to break prepared defences, the war settled into attrition where mass, industry and manpower matter most. That configuration favours the larger state, which is the central fact about the war's later course.

Neorealism

Russia Recognizes Separatist Entities

Moscow had demanded written guarantees excluding Ukraine from NATO and had been refused, and the recognition followed. Whether the alliance's enlargement caused the war is argued endlessly; that it was the stated grievance is not in dispute.

Full-Scale Invasion Begins

Ukraine was outnumbered in every category and survived because Russian forces were dispersed across four axes, undersupplied and unable to concentrate. Aggregate capability does not translate into battlefield superiority without competence, and the invasion is a demonstration of the gap.

Battle of Kyiv Repels Russia

Anti-tank weapons supplied in quantity by Western states neutralised armoured columns on approach roads, and drones did the rest. A modest transfer of capability to a defender in favourable terrain altered the outcome of a campaign.

Mariupol Falls

Holding out at Azovstal tied down Russian forces for weeks at a moment when they were needed elsewhere, which is the strategic function of a doomed defence. Time purchased at the cost of a garrison is a recognised and brutal exchange.

EU Grants Ukraine Candidate Status

The invasion produced exactly the outcome it was launched to prevent: Ukraine bound to the West, Finland and Sweden in NATO, and European defence spending rising sharply. Counterproductive is too mild a word for a strategic result this comprehensively inverted.

Kharkiv Counteroffensive

Precision artillery supplied by Western states allowed Ukraine to strike depots and bridges beyond the front, degrading logistics before the attack. A specific capability transferred at a specific moment changed what was operationally possible, and the debate in supporting capitals about which systems to send was therefore a debate about the war's course rather than a technical matter.

Russia Declares Four Annexations

Declaring the territory Russian was accompanied by statements that it would be defended by all available means, an implied nuclear threat. Extending a deterrent over contested ground is an attempt to convert a conventional weakness into a strategic constraint on the opponent.

War Becomes Attritional

Artillery ammunition production became the decisive variable, and Western industrial capacity had been allowed to atrophy after the Cold War. Capability in a long war is measured in factories, and the rebuilding takes years that a war does not allow.

Liberalism

Russia Recognizes Separatist Entities

The decision was announced after a televised security council meeting in which officials endorsed it one by one, visibly under pressure. A system with no constraint on the executive produced a decision that a wider deliberation might have stopped.

Full-Scale Invasion Begins

Ukrainian resistance was popular as well as military: territorial defence units, civilian logistics, and a government that stayed in the capital. Legitimacy converted into fighting power in a way that Russian planning had not accounted for at all.

Battle of Kyiv Repels Russia

Bucha's mass graves were documented by journalists, investigators and satellite imagery within days of the withdrawal. The evidentiary record produced in this war is the most extensive ever assembled during a conflict, and it hardened European positions immediately.

Mariupol Falls

The theatre sheltering civilians was struck despite the word for children written in Russian outside it, visible from the air. Whatever the explanation, the incident became the war's most cited instance of civilian harm and shaped opinion across Europe.

EU Grants Ukraine Candidate Status

Accession requires judicial reform, anti-corruption institutions and administrative capacity, which Ukraine must build while fighting. The conditionality is a powerful instrument for domestic reform and a demanding one to apply to a country under invasion.

Kharkiv Counteroffensive

Russia announced partial mobilisation within three weeks of the withdrawal, and hundreds of thousands left the country. Bringing the war home to a population that had been insulated from it produced the regime's first serious domestic difficulty.

Russia Declares Four Annexations

Referendums were conducted in days under occupation with soldiers accompanying ballot boxes, and reported margins above ninety per cent. The procedure was identical to the one used in Crimea eight years earlier and was not intended to persuade anyone outside Russia. Its function was domestic, and it worked domestically.

War Becomes Attritional

Sustaining support required legislatures in a dozen democracies to keep voting funds against competing domestic priorities and rising fatigue. The durability of assistance depends on electoral cycles, which an authoritarian opponent can simply wait out.

Neoliberalism

Russia Recognizes Separatist Entities

Minsk had never been implemented by either party and had become a framework nobody wanted and nobody would abandon. Agreements that persist without compliance provide a form of stability, and discarding one removes the last procedural obstacle.

Full-Scale Invasion Begins

Sanctions of unprecedented scope were imposed within days, including freezing central bank reserves, which had never been done to a major economy. The instrument was available because the machinery had been built and rehearsed since 2014.

Battle of Kyiv Repels Russia

The International Criminal Court opened an investigation within a week of the invasion, on referral by more than forty states parties. Institutions built over decades were activated in days, which is the return on having established them in advance.

Mariupol Falls

The surrender was negotiated through the International Committee of the Red Cross and the United Nations, with prisoner exchanges following months later. Humanitarian intermediaries functioned even between parties in total conflict, which is the institution's central purpose.

EU Grants Ukraine Candidate Status

The Union deployed instruments it had never used at this scale: temporary protection for refugees, financing for weapons through the peace facility, and joint procurement. Institutional improvisation under pressure produced tools that have since become permanent.

Kharkiv Counteroffensive

Weapons were supplied through coordinated contact groups meeting monthly, matching requests to donors and organising training. Sustaining a war by committee across thirty states required machinery that did not exist in February and worked by September.

Russia Declares Four Annexations

Non-recognition was near-universal and immediate, and the General Assembly condemned the annexations by one hundred and forty-three votes. The machinery of collective non-recognition operated faster and drew more support than in 2014, which suggests that repeated use of the same instrument against the same state does accumulate something, even without reversing anything.

War Becomes Attritional

Drones costing a few hundred dollars destroyed vehicles costing millions, and both sides restructured their forces around them within two years. Adaptation at that speed is unusual and has changed the assumptions of every military watching.

English School

Russia Recognizes Separatist Entities

Recognising separatist entities within a member state's borders violates the rule against interference that Russia had itself invoked in Kosovo and elsewhere. The inconsistency was noted immediately by states that had heard the earlier argument.

Full-Scale Invasion Begins

A permanent member of the Security Council invaded a neighbouring member state, which the organisation was designed to prevent and is constitutionally incapable of addressing. The Charter's central prohibition was breached by one of its guarantors.

Battle of Kyiv Repels Russia

Deliberate killing of civilians in occupied territory breaches the most settled rules of armed conflict, and the response was documentation and indictment rather than protection. International society's instruments operate after the fact, which is their permanent limitation.

Mariupol Falls

Siege warfare against a city containing civilians engages the clearest prohibitions in the law of armed conflict, and it has been used repeatedly in this century. That the practice keeps recurring despite unambiguous law is the pattern of the period.

EU Grants Ukraine Candidate Status

Membership in the European order was offered as a form of recognition of what Ukraine had claimed to be for two decades. Admission to a society of states is the strongest endorsement its members can give, and it was given here as a political act.

Kharkiv Counteroffensive

Supplying arms to a state defending itself against invasion is lawful and was described in those terms throughout. The distinction between assisting self-defence and becoming a party to the conflict was maintained carefully by every government involved.

Russia Declares Four Annexations

Acquisition of territory by force is prohibited absolutely, and this was the largest such attempt in Europe since the Second World War. International society's response, denial of legitimacy without capacity to reverse, is the same instrument it has used for a century.

War Becomes Attritional

Two states have fought a large interstate war in Europe for years with no serious mediation process and no forum in which it could occur. International society's conflict management capacity, when a permanent member is a party, is effectively zero.

Constructivism

Russia Recognizes Separatist Entities

The address accompanying the recognition denied that Ukraine had ever been a genuine state, describing it as a creation of Bolshevik policy. Denying an adversary's existence as a nation is the groundwork for denying it should have a state.

Full-Scale Invasion Begins

Zelensky's refusal of evacuation and his nightly addresses constructed a national resistance that had not been assumed to exist. What Ukrainians and their supporters came to believe about their own capacity in the first week shaped everything that followed.

Battle of Kyiv Repels Russia

Bucha ended the argument in several European capitals about whether the war could be managed diplomatically. Images did political work that months of briefings had not, and German policy in particular changed within weeks of them.

Mariupol Falls

Mariupol acquired the meaning that Aleppo and Grozny had before it, and Ukrainians drew the explicit comparison from the first week. Establishing what a siege signifies shaped both Ukrainian determination and European willingness to arm them.

EU Grants Ukraine Candidate Status

The war was framed in Kyiv and in Brussels as a choice about which Europe Ukraine belonged to, which is the question the 2013 protests had begun with. The conflict's meaning returned to where the sequence started.

Kharkiv Counteroffensive

The counteroffensive changed what supporters and opponents believed about the war's likely outcome, and the change in expectation unlocked weapons systems that had been refused months earlier. Beliefs about who is winning determine what assistance is available.

Russia Declares Four Annexations

The annexation ceremony framed the war as a civilisational conflict with the West rather than a dispute over territory. Escalating the stakes rhetorically makes compromise harder for the party that does it, which may have been the intention.

War Becomes Attritional

Attention in supporting states declined as the war became routine, which affects the political sustainability of assistance more than any strategic assessment. Wars end partly when audiences stop watching, and that dynamic favours the side that can ignore its own public.

✦ See Russia's Full-Scale Invasion of Ukraine unfold on the interactive world map