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Defense

The Pentagon and the military departments, intelligence agencies, and commands under it.

Combatant Commands
The eleven unified commands through which the President and Secretary of Defense direct American forces around the world
Defense Advanced Research Projects Agency
The Pentagon's high-risk research agency, whose projects helped create the internet, GPS, and stealth aircraft
Defense Contract Management Agency
The Pentagon agency that oversees defense contractors after contracts are signed, checking quality, cost, and delivery
Defense Health Agency
The agency that runs the military health system, including TRICARE and the military hospitals and clinics
Defense Intelligence Agency
The Pentagon's all-source intelligence agency, focused on foreign militaries and threats to U.S. forces
Defense Logistics Agency
The Pentagon's supply chain manager, buying the fuel, food, spare parts, and medical supplies the military runs on
Missile Defense Agency
The Pentagon agency that develops systems to detect and destroy incoming ballistic and hypersonic missiles
National Geospatial-Intelligence Agency
The agency that analyzes satellite and aerial imagery and produces the maps and geographic data used by the military and intelligence community
National Guard Bureau
The federal office that links the states' National Guard forces to the Army, the Air Force, and the Pentagon
National Reconnaissance Office
The agency that designs, builds, launches, and operates the nation's spy satellites
National Security Agency
The intelligence agency that intercepts foreign communications and protects the government's most sensitive networks
Office of the Secretary of Defense Reorganizing
The civilian headquarters staff through which the Secretary of Defense runs the Pentagon
The Department of Defense
The largest employer on earth: the Pentagon, three military departments, the combatant commands, and a budget near 900 billion dollars
The Department of the Air Force
The youngest military department, home to the Air Force and, since 2019, the Space Force
The Department of the Army
The military department that recruits, trains, and equips the land force, the oldest and largest of the services
The Department of the Navy
The military department for the fleet and the Marine Corps: two services, one secretary
The Joint Chiefs of Staff
The senior uniformed leaders who advise the President and Secretary of Defense but command no troops
The Pentagon
The five-sided headquarters of the Department of Defense in Arlington, Virginia, and a shorthand for the military establishment itself
The United States Space Force
The newest and smallest service: satellites, launch, missile warning, and the GPS signal the world runs on
U.S. Army Corps of Engineers
The Army command that builds military facilities and runs the nation's navigation channels, flood control works, and dams