The United States Marine Division, mid 1943 to mid 1944
Headquarters Battalion
Divisional Headquarters Company
Signal Company
Military Police Company
Special Weapons Battalion
Headquarters and Service Battery
Antiaircraft Artillery Battery - with sixteen towed 40-mm guns, divided into four Platoons with four guns per Platoon.
Three Antitank Batteries - each with six 37-mm antitank guns in three Platoons of two guns each, plus a fourth Platoon with two halftrack mounted 75-mm guns.
Three Marine Infantry Regiments, each comprised of;
Headquarters and Service Company
Weapons Company - with twelve 37-mm antitank guns in three Platoons of four guns each, plus a fourth Platoon with two halftrack mounted 75-mm guns.
Three Marine Infantry Battalions - click on The United States Marine Battalion early 1943 to mid 1944 link for more detail.
Light Tank Battalion
Headquarters and Service Company
Three Light Tank Companies - each with eighteen light tanks.
Scout Company
Amphibian Tractor Company
Headquarters and Service Company
Three Amphibian Tractor Companies - each with thirty (?) tractors
Divisional Artillery Regiment
Headquarters and Service Battery
Three Pack Battalions - each with twelve 75-mm pack howitzers, divided into three Batteries with four guns per Battery.
Two Howitzer Battalions - each with twelve 105-mm howitzers, divided into three Batteries with four guns per Battery.
Divisional Engineer Regiment
Headquarters and Service Company
Engineer Battalion - with Headquarters Company and three Engineer Companies
Pioneer Battalion - with Headquarters Company and three Pioneer Companies
Naval Construction Battalion ('Seabees' assigned from US Navy)
Service Battalion
Headquarters Company
Service and Supply Company
Ordnance Company
Motor Transport Battalion
Headquarters and Service Company
Three Transport Companies
Medical Battalion
Headquarters and Service Company
Five Medical Companies
Points of note
The above 'E' Series organisation was introduced from April 1943. Major changes included the loss of the fourth Company from the Light Tank Battalion, while its Scout Company moved from White Scout cars to Jeeps. Divisional Artillery was increased with the arrival of a second 105-mm Howitzer Battalion. The 37-mm antitank gun now officially replaced the previously proposed, but not issued, 20-mm dual purpose antiaircraft and antitank guns.
The United States Marine Corps
United States Marine Divisional Organisations