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,
General Counsel of the Department of Defense position on specific legal problems; maintains repository for all international agreements coordinated, negotiated, or concluded by DoD personnel; and is "dual-hatted" as Director of the Defense Legal Services Agency. This position was established by Reorganization Plan No. 6 of 1953 and by Defense Directive 5145.1, signed 24 August 1953. The position derived its responsibilities from one of the original three Special Assistants to the Secretary (established in 1947) and the Assistant Secretary of Defense (Legal and Legislative Affairs) (established in 1949). General Counsel of the Department of Defense The General Counsel of the Department of Defense is the chief legal