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
Fairlington, Arlington, Virginia located in the Fairlington Community Center. All of Fairlington, including the Alexandria portion, is in the 22206 ZIP code area and is served by the United States Postal Service's Shirlington Annex Post Office although the Parkfairfax Post Office in Alexandria is closer to most of Fairlington. Fairlington, Arlington, Virginia Fairlington is an unincorporated neighborhood in Arlington County, Virginia, United States, located adjacent to Shirlington in the southernmost part of the county on the boundary with the City of Alexandria. The main thoroughfares are Interstate 395 (Shirley Highway) which divides the neighborhood into North and South Fairlington, State Route 7 (King