US Army Organization

Number of Soldiers

COMBAT FORMATIONS				ADMINISTRATIVE FORMATIONS
X X X X X X	Theater			Command
X X X X X	Army Group
X X X X	Army 40,000 – 400,000			Branch
X X X	Corps 20,000 – 80,000
X X	Division 10,000 – 16,000			Regiment
X	Brigade 3,000 – 5,000
I I I	Group		Regiment
I I	Battalion 500-900		Squadron
I	Company 90-200	Battery	Troop
	Platoon / Detachment 20-40
	Section
	Squad 8
	Team / Crew
	Installation

Source:

Federation of American Scientists

1717 K St., NW, Suite 209

Washington, DC 20036

http://fas.org/man/dod-101/army/unit/