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THE G-SERIES MARINE DIVISION
The G-series table of organization was based on lessons learned in the Central Pacific campaigns of 1944. It was officially implemented throught the Fleet Marine Force in September 1945. But the 1st, 2nd, and 6th Marine Divisions adopted it during January 1945 and deployed for the Okinawa campaign under the G-series configuration. . The G-100 Marine division was a powerfully armed and flexible combat force that would have been tested by all Marine divisions in the planned invasion of Japan.
Marine Division Table of Organization G-100
Divisional units |
Officer |
Enlisted |
Total |
| Division Headquarters |
(88) |
(281) |
(369) |
| Headquarters Battalion |
180 |
1,614 |
1,794 |
| Tank Battalion |
28 |
595 |
623 |
| Service Troops |
157 |
2,090 |
2,247 |
Motor Transport Battalion |
(49) |
(857) |
(906) |
| Service Battalion |
(42) |
(690) |
(732) |
Medical Battalion |
(66) |
(543) |
(609) |
| Engineer Battalion |
41 |
834 |
875 |
| Pioneer Battalion |
43 |
697 |
740 |
| Artillery Regiment |
185 |
2,476 |
2,661 |
| 3 Infantry Regiments |
444 |
9,792 |
10,236 |
| Division Totals |
1,078 |
18,098 |
19, 176 |
Note 1: unit total strengths include 114 Naval officers and 680 Navy enlisted men. These were primarily doctors, hospital corpsmen and chaplains.
Note 2: Numbers in parentheses are reflected in the total of the next higher level unit. |
Major Weapons of the G-series Marine Division
WEAPON |
NUMBER |
| Carbine, .30 cal., M1 |
10,371 |
| Flamethrower, portable, M2-2 |
108 |
| Flamethrower, mechanized , M 3-4-3 |
18 |
| Gun, 37mm, antitank |
24 |
| 105mm M7 motor carriage |
12 |
| M1919A4 machine gun |
356 |
| M1917A1 machine gun |
162 |
| M2 HB machine gun |
161 |
| M1A1 .45 submachine gun |
49 |
| Howitzer, 155mm , M1 |
12 |
| Howitzer, 105mm , M2A1 |
36 |
| 2.36 in. rocket launcher , M9A1 |
153 |
| 60mm mortar |
117 |
| 81mm mortar |
36 |
| M1911A1 .45 cal. pistol |
1,707 |
| Rifle, .30 cal., M1 |
6,261 |
| M1918A2 BAR |
867 |
| Shotgun, 12 gauge |
306 |
| M4 medium tank |
46 |
| M4 medium tank, flamethrower |
9 |
| M32B2 tank retriever |
3 |
NOTE: The source for all information on the page is T/O G-100, 4 Sep 1945
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