Player Embed Code: Download Embed Share Building European-Led Defense: U.S. National Guard Leaders at the Senior Executive Seminar George C. Marshall Center for Security Studies July 17, 2025 | 1:32 During the July 2025 Senior Executive Seminar at the Marshall Center, two U.S. National Guard adjutants general shared their perspectives on building credible European-led deterrence and advancing collective security through burden-sharing. The seminar brought together senior leaders from across Europe and North America to address strategic challenges in transatlantic security, defense investment, and institutional readiness.