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,
Lyon Village, Arlington, Virginia Lyon Village, Arlington, Virginia Lyon Village is a neighborhood, or "urban village" located in Arlington County, Virginia, along Lee Highway (U.S. Route 29). It adjoins Arlington County's government center (including the courthouse and police/jail complex), and is approximately one mile west of Rosslyn and less than a mile north of Clarendon, of which it is sometimes considered a sub-neighborhood, as is Cherrydale, the mostly residential district immediately west of Lyon Village. The Lyon Village Historic District encompasses 1,073 contributing buildings and 1 contributing structure. The District as a "cohesive residential neighborhood in northern Arlington County, Virginia, located immediately north of