Russia–Ukraine War

On February 24, 2022, Russia launched a full-scale invasion of Ukraine with the stated aims of "denazification" and "demilitarization" — objectives that masked what Ukrainian and Western governments characterized as an attempt to eliminate Ukraine as an independent state. The invasion was the largest military offensive in Europe since World War II and triggered the most significant rearrangement of European security since the Cold War.

Russia had occupied Ukraine's Crimean peninsula since 2014 and had supported armed separatists in the Donbas region (Donetsk and Luhansk oblasts) since the same year. The 2022 invasion was qualitatively different: a multi-axis assault by approximately 190,000 troops aimed at capturing Kyiv and decapitating the Ukrainian government, occupying the south to link Crimea with Russia, and overrunning the east. The initial assault on Kyiv failed within weeks due to fierce Ukrainian resistance, logistical failures, and intelligence miscalculations. Russia withdrew from northern Ukraine in late March 2022 and refocused on the Donbas and south, where fighting settled into grinding attritional warfare resembling, in some respects, the trench warfare of World War I.

The human cost has been enormous and difficult to verify. The UK Ministry of Defense, US intelligence estimates, and independent analysts suggest Russian military deaths between 150,000–200,000, with a comparable number wounded — representing catastrophic losses for what was considered one of the world's foremost military powers. Ukraine's military casualties are less publicly known but estimated in a similar range. UN-verified Ukrainian civilian deaths exceed 12,000 confirmed, though actual figures are likely several times higher. The devastation of cities like Mariupol — which was reduced to rubble after a nearly three-month siege — and Bakhmut have been compared to WWII urban warfare.

The war has had global consequences far beyond the battlefield. It triggered a European energy crisis as countries scrambled to replace Russian gas. It prompted NATO expansion (Finland joined in 2023, Sweden in 2024). It accelerated Western defense spending commitments. It created one of Europe's largest refugee crises since WWII, with over 6 million Ukrainians fleeing abroad and millions more internally displaced. The war has also tested the durability of Western support for Ukraine over a multi-year attritional conflict — a test that continued into 2026 with no clear resolution in sight.