Appendix I
Comparison of Organization--Marine Division¹

See also Staff Officer's Field Manual for Amphibious Operations --HyperWar

Unit	D Series	E Series	F Series	G Series	Notes
Marine Division	19,514	19,965	17,465	19,176
Special Troops	3,031	2,317
HqBn	(697)	(851)	1,004	1,794
HqCo	(334)	(420)	(483)	(649)
SigCo	(267)	(340)	(292)	(348)
MPCo	(96)	(101)	(102)	(99)
ReconCo		*	(127)	(113)	*Prior to F-Series T/O, ReconCo was ScoutCo of Tank Bn
AssltSigCo				*(465)	*In May 1945, JASCO reorganized when J(oint) dropped and unit became organic to Marine division.
RocketPlt				((56)
WarDogPlt				*(64)	*Not including the 36 dogs assigned to each platoon.
SpecWpnsBn	(856)	(757)
H&SBtry	(99)	(102)
40mmAAABtry	(307)	(307)
90mmAAABtry	(126)
3 AT Btrys	(100)	(116)
Parachute Bn	*(583)				*Became Corps Troops unit 15Apr43.

Unit	D Series	E Series	F Series	G Series	Notes
Lt TankBn	(895)	(707)	630	623	*Became 1st, 2d, etc. TankBn w/F-Series.
H&S Co	(80)	(85)	(123)	(113)
Scout Co	(175)	(139)	*		*Redesignated to Div ReconCo w/F-Series.
4 Tank Cos	(160)	*(161)	(169)	(170)	*Reduced to 3 cos. w/E-Series.
Service Troops	1,946	2,200	1,889	2,247
Service Bn	(959)	(661)	(751)	(732)
HqCo	(55)	(62)	(68)	(57)
Serv&SupCo	(352)	(455)	(502)
Service Co				(276)
Supply Co				(157)
OrdCo	(109)	(144)	(178)	(242)
DivTransCo	(116)
3 RegtlTransCos	(109)
MT Bn		(527)	(539)	(906)
H&S Co		(188)	(194)	(76)
3 TransCos		(113)	(115)
AutoRprCo				(349)
AmphibTrkCo				(145)
4 Trk Cos				(84)
MedBn	(506)	(526)	(599)	(609)
H&SCo	(16)	(21)	(89)	(104)
5 MedCos	(98)	(101)	(102)	(101)
AmTracBn	(481)	(486)	*		*Became Corps Troops unit 5May44.

Unit	D Series	E Series	F Series	G Series	Notes
EngrRegt	2,452	2,513	*		*EngrRegt as such broken up into an EngrBn and a PionBn on 5May44; Seabees taken away from divisions, to be assigned/attached for specific operations.
H&SCo	(273)	(290)
Engr Bn	(614)	(645)	904	875
HqCo	(29)	(60)	(307)	(275)
3 Engr Cos	(195)	(195)	(199)	(200)
Pioneer Bn	(743)	(744)	745	750
HqCo	(119)	(120)	(127)	(134)
3 PionCos	(208)	(208)	(206)	(202)
Naval ConstBn	(822)	(838)
Artillery Regiment	2,581	3,207	2,639	2,661
H&S Btry	(159)	(204)	(229)	(249)
105mm HowBn	(607)	*(594)	(602)	**(592)	*Increased to 2 per regt. **Increased to 3 per regt.
H&S Btry	(154)	(150)	(161)	(166)
3 105mm HowBtrys	(151)	(148)	(147)	(142)
3 75mm PackHowBn	(605)	(605)	*(603)		*Reduced to 2 per regt.
155mm HowBn				(636)
H&S Btry				(162)
3 155mm HowBtrys				(158)
3 Infantry Regiments	3,168	3,242	3,218	3,412
H&S Co	(173)	(186)	(261)	(249)
Wpns Co	(196)	(197)	(203)	(175)
3 Infantry Bns	(933)	(953)	(918)	(996)

Unit	D Series	E Series	F Series	G Series	Notes
HqCo	(89)	(137)	(213)	(270)
Wpns Co	(273)	(228)
3 Rifle Cos	(183)	(196)	(235)	(242)

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Footnotes

1. All unit strength figures enclosed in parentheses are included in the strength totals of parent units. For a more complete breakdown of each of the four T/O series noted in this table, see Appendix H, supra, and the appropriate appendices in all previous books in this series with the exception of Volume I. The material in this appendix is derived from the Tables of Organization Subject File (HRS, HistBr, HQMC). The various T/Os were approved on the following dates: D-Series, 1Ju142; E-Series, 15Apr43; F-Series, 5May44; and G-Series, 4Sep45.