III AMPHIBIOUS CORPS . . . MajGen Roy S. Geiger
- Corps Troops . . . . . . LtCol William F. Whitaker
Headquarters and Service Battalion
Signal Battalion3d Separate Radio Intelligence Platoon, Mobile Communication Unit 43D, Detachment, Air Warning Squadron
1st Military Police Battalion, FMFPac (less Company D)
Company A, 1st Provisional Military Police Battalion (USA)
Landing Force Air Support Control Unit No 1
Medical Battalion
Corps Evacuation Hospital No 2
Corps Evacuation Hospital No 3
Corps Engineer Group44th Naval Construction Regiment (less 58th Naval Construction Battalion, 130th Naval Construction Battalion, 145th Naval Construction Battalion, and 11th Special Naval Construction Battalion, reinforced)
Corps Service Group
71st Naval Construction Battalion
1st Separate Engineer Battalion
8024 Aviation Engineer Battalion (USA)Headquarters, Service Group
1st Bomb Disposal Company (less 2d and 3d Platoons)
Headquarters, Shore Party
Company D, 1st Military Police Battalion, FMFPac
11th Motor Transport Battalion, FMFPac
7th Field Depot, reinforced
1st Laundry Company (less 1st, 2d, and 3d Platoons)
Detachment B-8, Military Government
Detachment C-1, Military Government
G-10 Dispensary No 12
G-6 Hospital No 1- Corps Artillery . . . . . . BrigGen David R. Nimmer
Headquarters Battery, Corps Artillery
6th 155mm Howitzer Battalion
Headquarters Battery, 2d Provisional Field Artillery Group
8th 155mm Gun Battalion
9th 155mm Gun Battalion1st 155mm Howitzer Battalion
456th Amphibian Truck Company (USA)
3d 155mm Howitzer Battalion
7th 155mm Gun Battalion
Marine Observation Squadron 7- Corps Antiaircraft Artillery . . . . . . Col Kenneth W. Benner
Headquarters, 1st Provisional Antiaircraft Artillery Group
2d Antiaircraft Artillery Battalion
5th Antiaircraft Artillery Battalion
8th Antiaircraft Artillery Battalion
16th Antiaircraft Artillery Battalion- Corps Reserve . . . . . . . Col Victor F. Bleasdale
29th Marines
Company A, 6th Tank Battalion
Company C, 6th Engineer Battalion
Company C, 6th Pioneer Battalion
Company C, 6th Motor Transport Battalion
Company C, 6th Medical Battalion
3d Platoon, 6th Military Police Company
3d Platoon, Ordnance Company, 6th Service Battalion
3d Platoon, Service and Supply Company, 6th Service Battalion (less Post Exchange Section)
3d Band Section
Detachment, 6th Amphibian Truck Company
Detachment, 11th Special Naval Construction Battalion
Detachment, 26th Replacement Draft
Detachment, 33d Replacement Draft
3d Shore Fire Control Party, 6th Joint Assault Signal Company
3d Air-Ground Liaison Party, 6th Joint Assault Signal Company
3d Shore Party Communication Team, 6th Joint Assault Signal Company
1st War Dog Platoon- 1st Marine Division (Reinforced) . . . . . MajGen Pedro A. del Valle
Division Troops
Headquarters Battalion (less 1st Military Police Company)
Combat Team 1
1st Medical Battalion (less Companies A, B, and C )
4th Joint Assault Signal Company (less detachments)
154th Amphibian Truck Company (USA) (less detachments)
Detachment A-1, Military Government
Detachment B-1, Military Government
G-10 Dispensary No 17
G-10 Dispensary No 18
Assault Air Warning Teams
4th Provisional Rocket Detachment
4th War Dog Platoon1st Marines
Combat Team 5
Company A, 1st Engineer Battalion
Company A, 1st Pioneer Battalion
Company A, 1st Medical Battalion
Company A, 1st Motor Transport Battalion
Detachment, Ordnance Company, 1st Service Battalion (Attached: 2d Platoon 1st Bomb Disposal Company, less 2d and 3d Squads)
Detachment, Service and Supply Company, 1st Service Battalion
1st Platoon, 1st Military Police Company
Detachment, 4th Joint Assault Signal Company
Detachment, 454th Amphibian Truck Company (USA)5th Marines
Combat Team 7
Co B, 1st Engineer Battalion
Co B, 1st Pioneer Battalion
Co B, 1st Medical Battalion
Co B, 1st Motor Transport Battalion
1st Amphibian Tractor Battalion (less detachments)
Detachment, Ordnance Company, 1st Service Battalion (Attached: 3d Squad, 2d Platoon 1st Bomb Disposal Company)
Detachment, Service and Supply Company, 1st Service Battalion
2d Platoon, 1st Military Police Company
Detachment, 454th Amphibian Truck Company (USA)
Detachment, 4th Joint Assault Signal Company7th Marines
Artillery Group
Co C, 1st Engineer Battalion
Co C, 1st Pioneer Battalion
Co C, 1st Medical Battalion
Co C, 1st Motor Transport Battalion
8th Amphibian Tractor Battalion (less detachments)
Detachment, Ordnance Company, 1st Service Battalion (Attached: 2d Squad, 2d Platoon, 1st Bomb Disposal Company)
Detachment, Service and Supply Company, 1st Service Battalion
3d Platoon, 1st Military Police Company
Detachment, 454th Amphibian Truck Company (USA)
Detachment, 4th Joint Assault Signal Company11th Marines
Armored Amphibian Tractor Group3d Amphibian Truck Company
Detachment, 454th Amphibian Truck Company (USA)
Marine Observation Squadron 3
Detachment, 1st Amphibian Tractor Battalion
Detachment, 8th Amphibian Tractor Battalion3d Armored Amphibian Tractor Battalion (Provisional)
Tank Group1st Tank Battalion
Engineer Group
Detachment, 1st Amphibian Tractor Battalion
Detachment, 8th Amphibian Tractor Battalion
Tank Maintenance Platoon, Ordnance Company, 1st Service Battalion1st Engineer Battalion (less Companies A, B, and C)
Shore Party Group
145th Naval Construction Battalion (less detachments)1st Pioneer Battalion (less Companies A, B, and C)
Service Group
One-half, 11th Special Naval Construction Battalion
Detachment, 145th Naval Construction Battalion
Detachment, 4th Joint Assault Signal Company
Replacement Group1st Service Battalion (less detachments)
Military Police Group
1st Motor Transport Battalion (less Companies A, B, and C )
2d Platoon, 1st Laundry Company1st Military Police Company (less 1st, 2d, and 3d Platoons)
Company B, 1st Provisional Military Police Battalion (USA)
- 6th Marine Division (Reinforced) . . . . . . MajGen Lemuel C. Shepherd, Jr.
Division Troops
Headquarters Battalion (less detachments)
Combat Team 4
Company C, 1st Provisional Military Police Battalion (USA)
6th Joint Assault Signal Company (less detachments)
6th Amphibian Truck Company (less detachments)
Detachment A-3, Military Government
Detachment B-3, Military Government
Corps Artillery Liaison Teams
Early Air Warning Team4th Marines (less 2d Battalion (less Company E) )
Combat Team 22
Company A, 6th Engineer Battalion (less 2d Platoon)
Company A, 6th Pioneer Battalion (less 2d Platoon)
Company A, 6th Motor Transport Battalion (less 2d Platoon)
Company A, 6th Medical Battalion (less one collecting section)
Detachment, 26th Replacement Draft
Detachment, 33d Replacement Draft
1st Platoon, 6th Military Police Company (less detachment)
1st Platoon, Ordnance Company, 6th Service Battalion (less detachment)
1st Platoon, Service and Supply Company, 6th Service Battalion (less Post Exchange Section and detachment)
Detachment, 58th Naval Construction Battalion
Detachment, 11th Special Naval Construction Battalion
Detachment, 6th Amphibian Truck Company
1st Band Section (less detachment)
1st Shore Fire Control Party, 6th Joint Assault Signal Company (less detachment)
1st Air-Ground Liaison Party, 6th Joint Assault Signal Company (less detachment)
1st Shore Party Communication Team, 6th Joint Assault Signal Company (less detachment)
1st Section, 3d Platoon, 1st Bomb Disposal Company22d Marines
Division Artillery Group
Company B, 6th Engineer Battalion
Company B, 6th Pioneer Battalion
Company B, 6th Motor Transport Battalion
Company B, 6th Medical Battalion
Detachment, 26th Replacement Draft
Detachment, 33d Replacement Draft
2d Platoon, 6th Military Police Company
2d Platoon, Ordnance Company, 6th Service Battalion
2d Platoon, Service and Supply Company, 6th Service Battalion (less Post Exchange Section)
Detachment, 58th Naval Construction Battalion
Detachment, 11th Special Naval Construction Battalion
Detachment, 814th Amphibian Truck Company (USA)
5th Provisional Rocket Detachment
2d Band Section
3d Platoon, 1st Bomb Disposal Company (less 1st Section)
2d Shore Fire Control Party, 6th Joint Assault Signal Company
2d Air-Ground Liaison Party, 6th Joint Assault Signal Company
2d Shore Party Communication Team, 6th Joint Assault Signal Company15th Marines
Armored Amphibian Group
Detachment, 6th Amphibian Truck Company
Detachment, 814th Amphibian Truck Company (USA)
Marine Observation Squadron 61st Armored Amphibian Battalion
Tank Group
3-9-A Unit6th Tank Battalion (less Company A)
1st Amphibian Tractor Group
Tank Maintainance Platoon, Ordnance Company, 6th Service Battalion9th Amphibian Tractor Battalion
2d Amphibian Tractor Group4th Amphibian Tractor Battalion
Engineer Group6th Engineer Battalion (less detachments)
Shore Party Group
58th Naval Construction Battalion (less detachments)6th Pioneer Battalion (less detachments)
Service Group
26th Replacement Draft (less detachments)
33d Replacement Draft (less detachments)
Detachment, 6th Joint Assault Signal Company
814th Amphibian Truck Company (less detachments)
One-half, 11th Special Naval Construction Battalion (less detachments)6th Service Battalion (less detachments)
Division Reserve
6th Motor Transport Battalion (less detachments)
6th Medical Battalion (less detachments) (Attached: G-10 and G-11 Dispensary Units)2d Battalion, 4th Marines (less Company E)
2d Platoon, Weapons Company, 4th Marines
2d Platoon, Company A, 6th Engineer Battalion
2d Platoon, Company A, 6th Pioneer Battalion
2d Platoon, Company A, 6th Motor Transport Battalion
Detachment, Collection Section, Company A, 6th Medical Battalion
Detachment, 26th Replacement Draft
Detachment, 33d Replacement Draft
Detachment, 11th Special Naval Construction Battalion
Detachment, 1st Band Section
Detachment, 1st Platoon, 6th Military Police Company
Detachment, 1st Platoon, Ordnance Company, 6th Service Battalion
Detachment, 1st Platoon, Service and Supply Company, 6th Service Battalion
Detachment, 1st Shore Fire Control Party, 6th Joint Assault Signal Company
Detachment, 1st Air-Ground Liaison Party, 6th Joint Assault Signal Company
Detachment, Shore Party Communication Team, 6th Joint Assault Signal Company
Footnote
1. IIIAC OpPlan No 1-45, 1Feb45, 1-3; 1st MarDiv OpPlan 1-45, 10Feb45, 1-3; 6th MarDiv OpPlan No 1-45, 10Feb45, 1-3; 29th Mar SAR, Ph I&II, Chap II, 1-2.
Transcribed and formatted for HTML by Jerry Holden for the HyperWar Foundation