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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Unpacking the $1.5 Trillion FY 2027 Defense Budget Topline
Critical Questions by Seamus P. Daniels — April 10, 2026
The Fragile U.S.-Iran Ceasefire: Issues to Watch
Commentary by Daniel Byman — April 8, 2026
Adapting Under Fire: Ukraine’s Race to Reinvent Modern Defense
Transcript — April 3, 2026
Who Is Winning the Iran War?
Commentary by Daniel Byman — April 2, 2026
Past Events
Photo: GLOLABLMARITIMETRAFFIC.ORG (MARITIME TRAFFIC MAP); NASA EARTH OBSERVATORY (WILDFIRE MAP); MARIT JENTOFT NILSEN/NASA (SOIL MOISTURE MAP); DJALALXJAY/SKETCHFAB (SATELLITE); 1EXPERT/ADOBE STOCK (EARTH)
Golden Insights: Creating Value from Commercial Earth Observation Data
Photo: CSIS
How the War in Iran is Impacting Global Energy Infrastructure | All About the Base
Adapting Under Fire: Ukraine's Race to Reinvent Modern Defense
How is Korea Responding to the Iran Conflict? | The Capital Cable #132
Photo: CSIS
U.S. Navy Fighting Instructions with the Chief of Naval Operations
Photo: CSIS
Insights on U.S.–China Technology Competition
Photo: CSIS
U.S.–ROK Cyber Cooperation: Countering North Korean Cybercrime and Strengthening Active Cyber Defense
Photo: CSIS
What Are the Hidden Costs of the War with Iran? | State of Play
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
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Powering Maritime Dominance: A Conversation with ADM William Houston, USN
Event — April 22, 2026
Enemies in Agreement: A Virtual Book Talk with Dr. Jane Vaynman
Event — April 21, 2026
Strategic Forces Priorities: A Conversation with Senator Deb Fischer
Event — April 20, 2026
Unpacking the $1.5 Trillion FY 2027 Defense Budget Topline
Critical Questions by Seamus P. Daniels — April 10, 2026
Golden Insights: Creating Value from Commercial Earth Observation Data
Event — April 8, 2026
The Fragile U.S.-Iran Ceasefire: Issues to Watch
Commentary by Daniel Byman — April 8, 2026
How the War in Iran is Impacting Global Energy Infrastructure | All About the Base
Event — April 6, 2026
Adapting Under Fire: Ukraine's Race to Reinvent Modern Defense
Event — April 3, 2026
How is Korea Responding to the Iran Conflict? | The Capital Cable #132
Event — April 3, 2026
Adapting Under Fire: Ukraine’s Race to Reinvent Modern Defense
Transcript — April 3, 2026