US Department of Defense (DoD)

The U.S. Department of Defense (DoD) is the federal government agency responsible for national security and military operations. It oversees the armed forces—Army, Navy, Air Force, Marine Corps, and Space Force—and develops policies, plans, and strategies to protect the United States from threats. The DoD manages defense resources, conducts military training, and ensures readiness. Its mission is to defend the nation’s interests, maintain peace, and support allies through military strength, technological innovation, and strategic operations.