United States Department of Defense

(U.S. government) A civilian executive department providing the military forces needed to deter war and protect the security of the U.S. There are three departments within the Department of Defense: the Air Force, Army, and Navy. Contact: United States Department of Defense; 1400 Defense Pentagon; Washington, DC 20301-1400 USA; Tel: [1] (703) 571-3343; Web: www.defense.gov.

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