United States Department of Defense United States Department of Defense The Department of Defense (DoD, USDOD, or DOD) is an executive branch department of the federal government charged with coordinating and supervising all agencies and functions of the government concerned directly with national security and the United States Armed Forces. The department is the largest employer in the world, with nearly 1.3 million active duty servicemen and women as of 2016. Adding to its employees are over 826,000 National Guardsmen and Reservists from the four services, and over 742,000 civilians bringing the total to over 2.8 million employees. Headquartered at the Pentagon in Arlington, Virginia,
Streets and highways of Arlington County, Virginia Streets and highways of Arlington County, Virginia This article deals with the streets and highways of Arlington County, Virginia, a suburb of Washington, D.C. in the United States. In 2009, the county maintains of roads. , the total mileage of (primary) state highways in Arlington County was 39.66 (59 km). Arlington County is one of only two counties in Virginia which maintain its own roads (with the exception of primary state highways, including U.S. Highways and Interstates), the other being Henrico County outside the State Capital of Richmond. Because of this special status, there are no secondary state roads and,