The 101st Airborne Division was made up from four regiments, an attached glider infantry battalion, three artillery battalions, an AAA/AT battalion, and an engineer battalion, plus support units. The paper strength was 12,335 men and officers in 1943.
501st Parachute Infantry Regiment,
502nd Parachute Infantry Regiment,
506th Parachute Infantry Regiment,
327th Glider Infantry Regiment
Each regiment consisted of three battalions, each battalion containing three companies. 1st Battalion had Able, Baker and Charlie companies, plus a headquarters (HQ) company, 2nd Battalion had Dog, Easy, and Fox, plus Battalion HQ companies, and 3rd Battalion had George, How and Item, plus HQ companies. Each company consisted of three platoons and a headquarters section. Each platoon consisted of three 12-man rifle squads and a six-man mortar team squad. Each squad had a .30 machinegun, and the mortar team a 60 mm mortar. A company totalled 132 men and 8 officers.
1/401st Glider Infantry (an attached battalion),
321st Glider FA Battalion (75mm field artillery),
907th Glider FA Battalion (105mm field artillery),
377th Parachute FA Battalion (75mm field artillery),
81st Airborne AAA/AT Battalion (antiaircraft artillery/antitank)
326th Airborne Engineer Battalion,
101st Signal Company,
326th Airborne Medical Company,
426th Airborne Quartermaster Company