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,
Arlington County, Virginia, street-naming system Arlington County, Virginia, street-naming system This article details the street-naming system of Arlington County, Virginia in the United States. Although the streets of Arlington County are not laid out on a grid plan, its local streets follow sequential numbered or alphabetic patterns that are both rational and provide address numbering information. A numbered and alphabetical street-naming scheme suggests that Arlington is or once was laid out on a continuous rectilinear grid plan, which in many parts of the County it is not (although very few parts of the County are laid out using the cul-de-sac type development which is more