Organizational structure of the United States Department of Defense of the Treasury. According to the U.S. Code, the Coast Guard is at all times considered one of the five armed services of the United States. During times of declared war (or by Congressional direction), the Coast Guard operates as a part of the Navy; this has not happened since World War II, but members have served in undeclared wars and conflicts since then while the service remained in its peacetime department. The Pentagon, in Arlington County, Virginia, across the Potomac River from Washington, D.C., is the Department's headquarters. The Department is protected by the Pentagon Force Protection Agency, which
United States Post Office (Arlington, Virginia) United States Post Office (Arlington, Virginia) US Post Office-Arlington is a historic post office building located in the Clarendon neighborhood of Arlington, Virginia. It was designed and built in 1937, and is one of a number of post offices designed by the Office of the Supervising Architect of the Treasury Department under Louis A. Simon. The building is a one-story, pentagonal shaped brick building in the Georgian Revival style. Atop the entrance portico is a dome that rises above the buildings flat roof and is supported by four fluted limestone piers. The interior features murals by Auriel Bessemer picturing Indians