The US Army is comprised of an ascending hierarchy of units.
NOTE: The number of soldiers per unit varies with the time period and the source.
|
Unit
|
Number of Personnel
|
Composed of
|
|
team
|
4
|
|
|
squad
|
10
|
2 teams
|
|
platoon
|
40
|
4 squads
|
|
company
|
175
|
4 platoons + HQ
|
|
battalion
|
700 to 1,000
|
4 to 6 companies
|
|
regiment
|
1,500+
|
2 battalions + HQ
|
|
brigade
|
3,000 to 5,000
|
2 to 4 regiments + HQ
|
|
division
|
10,000 to 15,000
|
3 brigades + HQ + support
|
|
corps
|
20,000 to 45,000
|
2+ divisions
|
|
army (field)
|
100,000+
|
2+ corps
|
|
army group
|
up to 1,000,000
|
4-5 field army
|
