The Department of Defense is America's largest government agency. Our mission is to provide the military forces needed to deter war and ensure our nation's security.

Mar 13, 2025 · The U.S. Secretary of Defense oversees the Department of Defense and acts as the principal defense policy maker and adviser.

The Department of Defense is America's largest government agency. Our mission is to provide the military forces needed to deter war and ensure our nation's security.

The secretary of defense oversees the Defense Department and acts as the principal defense policymaker and advisor. Learn More

Sep 26, 2024 · The Secretaries and Deputy Prime Minister hailed progress being made under Pillar II to deliver capability to our defence forces while bolstering industry and innovation sector collaboration.

Mar 21, 2025 · The Department of Defense provides the military forces needed to deter war and ensure our nation's security.

Nov 16, 2024 · We announce the establishment of the “Trilateral Defense Consultations” to support alignment of policy and operational objectives of the Japan Self-Defense Forces (JSDF), the Australian ...

It is my pleasure to introduce U.S. Secretary of Defense, Lloyd Austin III, Australia Deputy Prime Minister and Minister for Defence, Richard Marles, and the United Kingdom Secretary of State for ...

Apr 8, 2024 · Strengthening our trilateral defense capabilities and our industrial capacity will enable AUKUS partners to deter coercion or aggression in the region more effectively.

The Department of Defense provides the military forces needed to deter war and ensure our nation's security. Our nation’s top civilian defense and military leaders work hard for the American ...