Ukraine War

Russia’s full-scale invasion of Ukraine is one of the defining conflicts of the twenty-first century, impacting everything from allied security architectures to global energy and food supply chains to the U.S. defense industry. CSIS produces leading research on the war in Ukraine and how it impacts European and U.S. security. 

Photo: U.S. Navy photo via DVIDS

Photo: U.S. Navy photo via DVIDS

Last Rounds? Status of Key Munitions at the Iran War Ceasefire

The United States has depleted its missile inventories but still has enough to continue fighting this war under any plausible scenario. The risk is with future wars—particularly against a peer competitor like China.

Report by Mark F. Cancian and Chris H. Park — April 21, 2026

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Photo: Wojciech Grzedzinski/Anadolu via Getty Images

Photo: Wojciech Grzedzinski/Anadolu via Getty Images

Russia’s Battlefield Woes in Ukraine

Russia has performed poorly on the battlefield in Ukraine and will likely hit the 1 million casualty mark in the summer of 2025. New CSIS data details Russia's slow rate of advance, heavy losses of equipment, and significant casualties.

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Brief by Seth G. Jones and Riley McCabe — June 3, 2025

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Spotlight On:  Drone Warfare

The Russia-Ukraine Drone War: Innovation on the Frontlines and Beyond

Video — May 28, 2025

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Experts

Seth G. Jones

Seth G. Jones

President, Defense and Security Department; Harold Brown Chair
Max Bergmann

Max Bergmann

Director, Europe, Russia, and Eurasia Program and Stuart Center
Daniel Byman

Daniel Byman

Director, Warfare, Irregular Threats, and Terrorism Program
Emily Harding

Emily Harding

Vice President, Defense and Security Department; Director, Intelligence, National Security, and Technology Program
Benjamin Jensen

Benjamin Jensen

Director, Futures Lab and Senior Fellow, Defense and Security Department
Jerry McGinn

Jerry McGinn

Director, Center for the Industrial Base and Senior Fellow, Defense and Security Department
Alek Jovovic

Alek Jovovic

Deputy Director, Center for the Industrial Base and Senior Fellow, Defense and Security Department

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Last Rounds? Status of Key Munitions at the Iran War Ceasefire

The United States has depleted its missile inventories but still has enough to continue fighting this war under any plausible scenario. The risk is with future wars—particularly against a peer competitor like China.

Report by Mark F. Cancian and Chris H. Park — April 21, 2026

Investing in Post Conflict Reconstruction | The Futures Summit

How are post-conflict reconstruction strategies being redesigned to balance immediate recovery needs with sustainable development goals, and how can different actors work together to build more resilient, inclusive, and durable systems?

Event — April 10, 2026

Europe Needs an ASAP Program for Air Defense

The U.S.-Iran war has exposed the fragility of Western air defense stockpiles. Europe must launch a crash program to scale up its own missile manufacturing before supply shortages leave Ukraine and the continent exposed.

Brief by Max Bergmann, Otto Svendsen, and Jonathan Burchell — March 23, 2026

Data Is Now the Front Line of Warfare

From Ukraine to the Gulf, private U.S. companies like Microsoft and AWS are now on the front lines of war. As Iran targets data centers, the Trump administration must decide how to protect them.

Commentary by Emily Harding — March 19, 2026

Russia-Ukraine War in 10 Charts

Four years after Russia’s full-scale invasion, the war in Ukraine has reshaped European security, global markets, and the balance of power. These 10 charts break down the battlefield, economic strain, military aid shifts, reconstruction costs, and what comes next.

Commentary by CSIS Scholars — February 24, 2026

The Russia-Ukraine War and Global Food Security: Impacts Four Years Later

Russia’s war in Ukraine caused immediate and widespread disruptions to Ukraine’s agriculture sector and global food markets. Today, new patterns are emerging, affecting Ukraine’s agricultural recovery and Russia’s ability to use its food exports for political benefit.

Critical Questions by CSIS Scholars — February 24, 2026