A military organization is a way of structuring the armed forces of a state as a need to offer military capability required by the national defence policy. In some countries paramilitary forces are included in a nation's armed forces. Armed forces that are not a part of the military or paramilitary organizations, such as insurgent forces, often mimic military organizations, or use ad hoc structures.

Military organization is hierarchical. The use of formalized ranks in a hierarchical structure came into widespread use with the Roman Army. In modern times, executive control, management and administration of military organizations is typically undertaken by the government through a government department within the structure of public administration, often known as a Department of Defense, Department of War, or Ministry of Defence. These in turn manage Armed Services that themselves command combat, combat support and service support formations and units.

• Air Force@ (292)
• Air National Guard@ (4)
• Army@ (393)

• Coast Guard@ (41)
• Marine Corps@ (76)
• Navy@ (247)

• Pentagon (12)
• White House Military Office@ (5)

• Global Security
  globalsecurity.org
  Index to overviews of all U.S. military facilities.