The typical U.S. Infantry Regiment was composed of 3,257 men.
There was a Hdqrs. and Hdqrs. Co; Cannon company, featuring six 105m howitzers; Anti-Tank Company, with nine 57mm anti-tank guns service company; Heavy Weapons company. (I will do a look-back for the equipment and numbers)
The infantry battalion was composed of 836 men.
Hdqrs. Anti-Tank Platoon Mine Platoon Ammo.Platoon Heavy Weapons Platoon, with 166 men, 8 heavy machine guns (50 cal.) and six 81 mm mortars Three Rifle Platoons, of 3 squads each Weapons Platoon, with 2 30 cal machine guns, and 3 60mm mortars.