The Pentagon, Washington DC
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The Pentagon is a five-sided building that serves as the headquarters for the U.S. Department of Defense. It was constructed to bring all offices of what was then termed the Department of War together into a single building. The Pentagon now contains offices for the departments of the Army, Air Force, and Navy, and for the Office of the Secretary of Defense.
Mailing Address:1400 Defense Pentagon, Washington DC 20301-1400
Pentagon Switchboard: 703-545-6700
Office of Public Communication: 703-428-0711
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