United States Department of Defense
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The United States Department of Defense, also known as the USDoD, is a department in the United States government that is in charge of the military of the United States. It was created in 1947 and its headquarters is in The Pentagon in Washington, D.C.. The person in charge of the Department of Defense is called the Secretary of Defense. The current Secretary of Defense is Pete Hegseth. The Secretary of Defense answers directly to the President.
The Department of Defense is made up of three Military Departments:the Department of the Army (United States Army),the Department of the Navy (United States Navy and Marine Corps),and the Department of the Air Force (United States Air Force and Space Force) along with the National Security Agency (NSA),and the Defense Intelligence Agency (DIA). The Department of the Navy includes the Navy and the Marine Corps. Also, during times of war the United States Coast Guard is under the authority of the Department of Defense.
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President Truman signs the National Security Act Amendment of 1949.
Organization of the Department of Defense following the creation of the United States Space Force
A December 2013 Department of Defense organizational chart
A 2008 Office of the Secretary of Defense organizational chart
Joint Chiefs of Staff and Joint Staff organizational chart
U.S. Department of Defense combatant command areas of responsibility
Defense spending as a percent of gross domestic product from 1792 to 2017
Total United States Defense outlays from 1962 to 2024 in $millions (2019 to 2024 are estimated)
