United States Department of Defense

United States Department of Defense
US Department of Defense seal.svg
United States Department of Defense Logo (2021).svg
Agency overview
Formed18 September 1947 (1947-09-18) (as National Military Establishment)
Preceding agencies
TypeExecutive Department
JurisdictionU.S. Federal Government
HeadquartersThe Pentagon
Arlington County, Virginia, U.S.
38°52′16″N 77°3′21″W / 38.87111°N 77.05583°W / 38.87111; -77.05583
  • 747,809 (civilian)[1]
  • 1,344,330 (active duty military)
  • 778,096 (National Guard and reserve)
  • 2,870,235 total (June 2022)
Annual budgetUS$721.5 billion (FY2020)[2]
Agency executives
Child agencies

The United States Department of Defense (DoD,[4] USDOD or DOD) is an executive branch department of the federal government charged with coordinating and supervising all agencies and functions of the U.S. government directly related to national security and the United States Armed Forces. The DoD is the largest employer in the world,[5] with over 1.34 million active-duty service members (soldiers, marines, sailors, airmen, and guardians) as of June 2022. The DoD also maintains over 778,000 National Guard and reservists, and over 747,000 civilians bringing the total to over 2.87 million employees.[6] Headquartered at the Pentagon in Arlington, Virginia, just outside Washington, D.C., the DoD's stated mission is to provide "the military forces needed to deter war and ensure our nation's security".[7][8]

The Department of Defense is headed by the secretary of defense, a cabinet-level head who reports directly to the president of the United States. Beneath the Department of Defense are three subordinate military departments: the Department of the Army, the Department of the Navy, and the Department of the Air Force. In addition, four national intelligence services are subordinate to the Department of Defense: the Defense Intelligence Agency (DIA), the National Security Agency (NSA), the National Geospatial-Intelligence Agency (NGA), and the National Reconnaissance Office (NRO). Other Defense agencies include the Defense Advanced Research Projects Agency (DARPA), the Defense Logistics Agency (DLA), the Missile Defense Agency (MDA), the Defense Health Agency (DHA), Defense Threat Reduction Agency (DTRA), the Defense Counterintelligence and Security Agency (DCSA), the Space Development Agency (SDA) and the Pentagon Force Protection Agency (PFPA), all of which are subordinate to the secretary of defense. Additionally, the Defense Contract Management Agency (DCMA) is responsible for administering contracts for the DoD. Military operations are managed by eleven regional or functional Unified combatant commands. The Department of Defense also operates several joint services schools, including the Eisenhower School (ES) and the National War College (NWC).

  1. ^ "DoD Personnel, Workforce Reports & Publications". Defense Manpower Data Center. 30 June 2022. Retrieved 30 October 2022.
  2. ^ "NATIONAL DEFENSE BUDGET ESTIMATES FOR FY 2021" (PDF). Department of Defense. Retrieved 12 May 2020.
  3. ^ Jim Garamone, Defense.gov (1 October 2019) Milley takes oath as 20th Chairman of Joint Chiefs of Staff
  4. ^ "Manual for Written Material" (PDF). Department of Defense. p. 9. Archived from the original (PDF) on 29 August 2004. Retrieved 10 December 2014.
  5. ^ "The World's Biggest Employers". Forbes. Retrieved 31 July 2015.
  6. ^ "DoD Personnel, Workforce Reports & Publications". www.dmdc.osd.mil. Retrieved 30 October 2022.
  7. ^ "U.S. DEPARTMENT OF DEFENSE > Our Story". www.defense.gov. Archived from the original on 7 October 2018. Retrieved 17 October 2018.
  8. ^ Szoldra, Paul (29 June 2018). "Trump's Pentagon Quietly Made A Change To The Stated Mission It's Had For Two Decades". Task & Purpose. Archived from the original on 30 June 2018. Retrieved 1 July 2018.

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