Defense and Security
Amid a rapid shift in the global balance of power, CSIS offers practical solutions to the hardest national security strategy questions. CSIS’s defense and security research covers issues including traditional missile defense, nuclear weapons, aerospace security, irregular threats, democratic institutions, and the use of AI and critical minerals in defense technologies.
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NATO’S Hidden Dividend and the Avoidable Cost of U.S. Withdrawal
Commentary by Philip Luck, Karen Jackson , and Oleksandr Shepotylo — April 22, 2026
Last Rounds? Status of Key Munitions at the Iran War Ceasefire
Report by Mark F. Cancian and Chris H. Park — April 21, 2026
Iran’s Strait of Hormuz Gambit and the Limits of U.S. Military Power
Commentary by Daniel Byman — April 20, 2026
Nordic Nukes: Seeking Strategic Agency in Uncertain Times
Commentary by Astrid Chevreuil, Gine Lund Bolling, and Sara von Bonsdorff — April 20, 2026
Past Events
Photo: PO1 Joshua M Tolbert/DVIDS
Powering Maritime Dominance: A Conversation with ADM William Houston, USN
Photo: Fadel SENNA / AFP via Getty Images
Has the Iran war transformed the Middle East's future? | State of Play
Photo: DENIS BALIBOUSE/POOL/AFP/Getty Images
Enemies in Agreement: A Virtual Book Talk with Dr. Jane Vaynman
Photo: CSIS
Space Strategic Dialogue: Space and the Future of Warfare with Gen. Stephen Whiting, Commander of U.S. Space Command
Photo: Alan Radecki/U.S. Navy/Northrop Grumman/Getty Images
Maintaining America’s Edge: Is the United States Losing the Lead in an Increasingly Competitive World?
Photo: Office of Senator Deb Fischer
Strategic Forces Priorities: A Conversation with Senator Deb Fischer
Photo: Government Accountability Office (GAO)
The FAR and Beyond: A New Era in Government Acquisition | All About the Base
Photo: CSIS
Golden Insights: Creating Value from Commercial Earth Observation Data
Related Programs
Defense and Security
Aerospace Security Project
Arleigh A. Burke Chair in Strategy
Center for the Industrial Base
Civil-Military Relations
Cooperative Defense Project
Defending Democratic Institutions
Defense Budget Analysis
Defense 360
Gray Zone Project
Hidden Reach
Missile Defense Project
Project on Nuclear Issues
Risk and Foresight Group
Smart Women, Smart Power
Strategic Futures
Warfare, Irregular Threats, and Terrorism Program
Experts
All Defense and Security Content
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What’s Next for Japanese Security Policy and U.S.-Japan Relations? Perspectives from the Diet
Event — May 4, 2026
Powering Maritime Dominance: A Conversation with ADM William Houston, USN
Event — April 22, 2026
NATO’S Hidden Dividend and the Avoidable Cost of U.S. Withdrawal
Commentary by Philip Luck, Karen Jackson , and Oleksandr Shepotylo — April 22, 2026
Enemies in Agreement: A Virtual Book Talk with Dr. Jane Vaynman
Event — April 21, 2026
Has the Iran war transformed the Middle East's future? | State of Play
Event — April 21, 2026
Space Strategic Dialogue: Space and the Future of Warfare with Gen. Stephen Whiting, Commander of U.S. Space Command
Event — April 21, 2026
Last Rounds? Status of Key Munitions at the Iran War Ceasefire
Report by Mark F. Cancian and Chris H. Park — April 21, 2026
Maintaining America’s Edge: Is the United States Losing the Lead in an Increasingly Competitive World?
Event — April 20, 2026
Strategic Forces Priorities: A Conversation with Senator Deb Fischer
Event — April 20, 2026
The FAR and Beyond: A New Era in Government Acquisition | All About the Base
Event — April 20, 2026