United States Department Of Defense
The Department of Defense (also known as the Defense Department, USDOD, DOD, DoD or the Pentagon) is the Executive Department of the Government of the United States of America charged with coordinating and supervising all agencies and functions of the government concerned directly with national security and the United States armed forces. The Department is also the largest employer in the world, with more than 2.13 million active duty Soldiers, Sailors, Marines, Airmen, and also civilian workers, and over 1.1 million National Guardsmen and members of the Army, Navy, Air Force, and Marine Reserves. The grand total is just over 3.2 million servicemen and servicewomen, plus the civilians who support them.
The Department – headed by the Secretary of Defense – has three subordinate military departments: the Department of the Army, the Department of the Navy, and the Department of the Air Force. In addition, there are many Defense Agencies such as the Defense Advanced Research Projects Agency (DARPA), the Defense Intelligence Agency (DIA), the Defense Logistics Agency (DLA), the Missile Defense Agency, the National Geospatial-Intelligence Agency (NGA), the National Reconnaissance Office (NRO), the National Security Agency (NSA), and the Pentagon Force Protection Agency (PFPA), all of which are under the command of the Secretary of Defense. DoD also operates several joint services schools, including the National Defense University (NDU) and the National War College (NWC).
The Department is allocated the highest level of budgetary resources among all Federal agencies, and this amounts to more than one-half of the annual Federal discretionary budget.
Read more about United States Department Of Defense: History, Organizational Structure, Expenditures, Energy Use, Related Legislation
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