Unit (military)

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A unit in the context of a military organization is a group of soldiers, with specified equipment, under a specific chain of command. A unit generally has one commander, the Commanding Officer, and is composed of sub-units.

All but the very smallest have a headquarters organization, which will contain both staff for planning and controlling operations, and often combat support and combat service support sub-units to support the main role. Some units may have specialized combat arms units under the direct control of the commander, such as artillery.

Units in land forces[edit]

Name	Personnel	NATO command rank	U.S. command rank
fire team	3-5	OR-4 to OR-5	E-4 to E-5
squad (land forces)	10-13	OR-4 to OR-6	E-6 to E-7
platoon (land forces)	20-40	OF-1	O-1
company (land forces)/troop/battery (military unit)	100-200	OF-3 to OF-4	O-3 to O-4
battalion/squadron (land forces)/squadron (air forces)	500-1000	OF-5	O-5
regiment/group (land forces)/group (air forces)/brigade	3000-5000	OF-6 to OF-7	O-6
division	10000-25000	OF-8	O-8
corps	30000-75000	OF-8	O-8 to O-9
field army	100000-300000	OF-9	O-9 to O-10

Naval forces[edit]

Due to variation in ship sizes and types, it is more difficult to assign numbers.

Administrative[edit]

Tactical[edit]

Task unit
Task group
Task force

Air Forces[edit]

Section
Flight
Squadron (air forces)
Group (air forces)/Wing (some nations' wings contain groups, and other nations groups are larger than wings)
Air Division
Numbered Air Force