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
Arlington House, The Robert E. Lee Memorial of Alexandria County to Arlington County to end ongoing confusion between Alexandria County and the independent city of Alexandria. The name Arlington was chosen to reflect the presence of the Arlington estate. On March 4, 1925, the 68th United States Congress enacted Public Resolution 74, which authorized the restoration of the Lee Mansion in the Arlington National Cemetery, Virginia. The War Department then began to restore Arlington House, and the Department of the Army continues to manage over half of the original plantation's 1,100 acres, as Arlington National Cemetery. However, for several years after Congress enacted the authorizing legislation, the