  
WWII Infantry
Regiments and Battalions
During World War II a U.S. Infantry Regiment consisted of 3,257 men, organized as
follows:
 | Headquarters and Headquarters Company |
| Canon Company with six 105 mm Howitzers |
| Antitank Company with nine 57 mm antitank guns |
| Service Company: |
| 1st Battalion with A, B, C, D Companies |
| 2nd Battalion with E, F, G, H Companies |
| 3rd Battalion with I, K, L, M Companies |
|
The U.S. Infantry Battalion consisted of 836 men, organized as follows:
| Top Level: Headquarters and Headquarters Company |
| Antitank Platoon with the 57 mm antitank guns |
| Mine Platoon |
| Intelligence and Reconnaissance Platoon |
| Ammunition and Pioneer Platoon |
| Heavy Weapons Platoon with 166 men, eight heavy machine guns, and six 81 mm mortars
|
| Three Rifle Companies of 193 men: each company had three rifle platoons of three squads
each and a weapons platoon with two .30 caliber light machine guns and three 60 mm
mortars. |
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