H.R. McMaster, President Trump's former National Security Advisor, discusses America's future security challenges

H.R. McMaster, President Trump's former National Security Advisor, discusses America's future security challenges

H.R. McMaster, President Trump's former National Security Advisor, discusses America's future security challenges 10 December 2026 — 09:00 TO 10:00 GMT Anonymous (not verified) 10 September 2026 Chatham House and Online Hear from one of America’s leading security and military thinkers on China, Europe, Iran and the future of US global leadership in an increasingly contested world. Lieut. Gen. (Ret.) H.R. McMaster commanded in Afghanistan and Iraq, oversaw training and modernization for the US Army’s infantry, armor, and cavalry force, and was an assistant professor of history at the US Military Academy. Hear one of America’s leading security and military thinkers talk about China, Europe, Iran, and the future of the US in an increasingly contested world. The United States faces mounting challenges as strategic competition intensifies, and conflicts reshape the international order. War with Iran, ongoing Russian aggression against Ukraine, rising tensions with China and fraying relationships with allies are changing Washington’s approach to global leadership. These developments raise fundamental questions about America’s role as a security guarantor, and the future of the transatlantic relationship. General McMaster will discuss: What are the most significant national security challenges facing the United States? How should Washington respond to the rise of China? What is the future of the transatlantic relationship and US–Europe cooperation? How can the United States strengthen deterrence while managing global commitments? What role should America play as a guarantor of international security? How is geopolitical competition reshaping the international order?