Defense and Security
CSIS’s defense and security research is led by the Missile Defense Project; Project on Nuclear Issues; Defense-Industrial Initiatives Group; Aerospace Security Project; Warfare, Irregular Threats, and Terrorism Program; Burke Chair in Strategy; Smart Women, Smart Power; Defending Democratic Institutions Project; and Defense Budget Analysis.

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What Allies Want: European Priorities in a Contested Security Environment
Report by Nicholas Adamopoulos — May 12, 2025

We Need More Off-Ramps for Nuclear Crises
Commentary by Heather Williams and Nicholas Adamopoulos — May 12, 2025

Building a Golden Dome: Lessons from the 1950s
Commentary by Peppi DeBiaso — May 12, 2025

Game On for the United States and Canada After Oval Office Opener
Commentary by Christopher Hernandez-Roy and Christopher Sands — May 9, 2025
Past Events

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Strategic Trends 2025: A Trans-Atlantic Look Ahead

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Insights for Future Conflicts from the Russia-Ukraine War

Photo: SEBASTIEN ST-JEAN/AFP/Getty Images
The Future of U.S.-Canada Minerals Cooperation

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Outlook for U.S.-Japan Relations: Perspectives from Japanese Legislators

Photo: CSIS
What is North Korea Learning from the Ukraine War? | The Capital Cable #111

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Report Launch: The Future of Arms Control and Euro-Atlantic Strategic Stability

Photo: CSIS
Whole of Society Resilience Lessons from Russia-Ukraine | Conflict in Focus

Photo: iLab/CSIS
After Impeachment: South Korean Presidential Election | The Capital Cable #110
Related Programs

Defense Budget Analysis

Defense-Industrial Initiatives Group

Missile Defense Project

Project on Nuclear Issues

Civil-Military Relations

Aerospace Security Project

Risk and Foresight Group

Strategic Futures

Warfare, Irregular Threats, and Terrorism Program

Gray Zone Project

Cooperative Defense Project

Defense 360

Arleigh A. Burke Chair in Strategy

Smart Women, Smart Power

Defending Democratic Institutions

Hidden Reach
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All Defense and Security Content
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2025 Global Security Forum, Strength Through the Storm: Industry, Innovation, and the Future of U.S. Military Power
Event — May 13, 2025
Strategic Trends 2025: A Trans-Atlantic Look Ahead
Event — May 12, 2025
What Allies Want: European Priorities in a Contested Security Environment
Report by Nicholas Adamopoulos — May 12, 2025
Building a Golden Dome: Lessons from the 1950s
Commentary by Peppi DeBiaso — May 12, 2025
We Need More Off-Ramps for Nuclear Crises
Commentary by Heather Williams and Nicholas Adamopoulos — May 12, 2025
Insights for Future Conflicts from the Russia-Ukraine War
Event — May 9, 2025
Game On for the United States and Canada After Oval Office Opener
Commentary by Christopher Hernandez-Roy and Christopher Sands — May 9, 2025
Analyzing Missile Attacks in Ukraine
Podcast Episode by H. Andrew Schwartz and Benjamin Jensen — May 9, 2025

Conflict in Focus: Insights for Future Conflicts from the Russia-Ukraine War
Transcript — May 9, 2025
Insights for Future Conflicts from the Russia-Ukraine War
Digital Report by Krista Auchenbach, Nathan Lewis, Scott Murphy, Quinton Packard, Scott Pence, Luke Slivinski, and Matthew Slusher — May 8, 2025