United States Marine Corps, 1940-1945

D-100 Series Marine Division (1 Jul 1942)

Element   Strength
Division HQ    
Special Troops   3,031
---HQ Battalion   697
------HQ Company   334
------Signal Company   267
------Military Police Company   96
---Special Weapons Battalion   856
------HQ and Service Battery   99
------Antitank Battery (x3) 6 37mm SP AT, 2 75mm SP AT 100
------40mm Antiaircraft Artillery Battery 16 40mm AA 307
------90mm Antiaircraft Artillery Battery 6 90mm AA 126
---Parachute Battalion   583
------HQ Company   106
------Parachute Company (x3) 3 2.36" RL, 3 60mm mortar 159
---Light Tank Battalion   895
------HQ and Service Company   80
------Tank Company (x4) 18 M3 tanks 160
------Scout Company 14 M3A1 scout cars 175
Service Troops   1,946
---Service Battalion   959
------HQ Company   55
------Service and Supply Company   352
------Ordnance Company   109
------Division Transport Company   116
------Regimental Transport Company (x3)   109
---Medical Battalion   506
------HQ and Service Company   16
------Medical Company (x5)   98
---Amphibian Tractor Battalion 100 amtrac, 59 spt amtrac 481
------HQ and Service Company    
------Amphibian Tractor Company (x3)    
Engineer Regiment   2,452
---HQ and Service Company   273
---Engineer Battalion   614
------HQ Company 24 flamethrowers 29
------Engineer Company (x3)   195
---Pioneer Battalion   743
------HQ Company   119
------Pioneer Company (x3)   208
---Naval Construction Battalion   822
------HQ Company    
------Construction Company (x3)    
Artillery Regiment   2,581
---HQ and Service Battery   159
---105mm Howitzer Battalion   607
------HQ and Service Battery   154
------105mm Howitzer Battery (x3) 4 105mm howitzers 151
---75mm Pack Howitzer Battalion (x3)   605
------HQ and Service Battery   152
------75mm Howitzer Battery (x3) 4 75mm howitzers 151
Infantry Regiment (x3)   3,168
---HQ and Service Company   173
---Weapons Company   196
------Company HQ   48
------75mm SP Gun Platoon 2 75mm SP AT 34
------20mm Antiaircraft and Antitank Gun Platoon (x3) 2 .50 MG, 6 20mm AA  
---Infantry Battalion (x3)   933
------HQ Company   111
---------Battalion HQ   75
---------Company HQ   36
------Weapons Company   273
---------Company HQ   29
---------20mm Antiaircraft and Antitank Gun Platoon 2 .50 MG, 4 20mm AA  
---------81mm Mortar Platoon 4 81mm mortars 76
---------Machine Gun Platoon (x3) 12 .30 HMG 48
------Rifle Company (x3)   183
---------Company HQ   29
---------Weapons Platoon 2 .30 LMG, 2 60mm mortars 28
---------Rifle Platoon (x3)   42
TOTAL   19,514

Weapons Recapitulation
Weapon Regiment # Division #
.45-cal M1911/M1911A1 pistol 17 798
.45-cal M50/M55 submachine gun 507 4,208
.30-cal M1 carbine 943 10,953
.30-cal M1903-series rifle
(snipers and rifle grenade launchers)
97 456
.30-cal M1 rifle 1,385 7,406
.30-cal M1918A2 automatic rifle (BAR) 162 513
.30-cal M1917A1 heavy machine gun (watercooled) 72 544
.30-cal M1919A4 light machine gun (aircooled) 36 656
.30-cal M1941 light machine gun (parachute battalion only)   87
.50-cal HB-M2 heavy machine gun (aircooled) 8 360
.50-cal M2 antiaircraft heavy machine gun (watercooled) 3 2
20mm Mk 4 antiaircraft gun   54
37mm M6 self-propelled antitank gun   20
40mm M1 antiaircraft gun   16
90mm M1 antiaircraft gun   6
75mm M3 self-propelled antitank gun (halftrack-mounted) 2 12
75mm M1A1 pack howitzer   36
105mm M2A1 howitzer   12
60mm M2 mortar 18 63
81mm M1 mortar 12 36
2.36-inch M1 antitank rocket launcher 44 132
M1 rifle grenade launcher (for M1903-series rifles) 97 456
M3-series light tank (earlier M2A4 also employed)   72
M3A1 scout car   14
LVT troop/cargo type amphibian tractor   100
LVT support type amphibian tractor   59
M1 portable flamethrower   *
The halftrack-mounted 75mm gun was not issued to regiments until near the end of the Guadalcanal campaign. Towed 75m M1897A2 field guns were used instead.

While the TO&E prescribed 20mm guns, battalion AT platoons were actually armed with obsolete 37mm M1916 infantry "AT" guns due to the priority of fitting available 20mm guns aboard ships. The M1916s, used as training weapons, were replaced by 37mm M3A1 AT guns before the units were committed to combat.

M1 rifles and M1 carbines were in limited supply until fully fielded within the FMF in late 1943. M1903-series rifles were issued in their place.

Limited numbers of flamethrowers were issued in late 1942.


Return to HyperWar: U.S. Marine Corps in World War II

Return to HyperWar: World War II on the World Wide Web


Last updated: December 18, 1999

Feedback: corrections, additions, and comments are welcome!

Compiled and formatted by Patrick Clancey