The Department of Defense (U.S.)

The U.S. Department of Defense (DoD) is the federal agency responsible for overseeing the nation's military forces, including the Army, Navy, Air Force, Marine Corps, and Space Force. It manages national security, defense strategies, and military operations to protect the country from threats. The DoD develops defense policies, maintains military readiness, and supports veterans. It operates under the authority of the President and Congress, ensuring the U.S. military is prepared to defend national interests both at home and abroad.