Appendix IV

 

Appendix IV
III Amphibious Corps Task Organization1

 

III AMPHIBIOUS CORPS . . . MajGen Roy S. Geiger

  1. Corps Troops . . . . . . LtCol William F. Whitaker
        Headquarters and Service Battalion
          Signal Battalion

            3d 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 Group

          44th Naval Construction Regiment (less 58th Naval Construction Battalion, 130th Naval Construction Battalion, 145th Naval Construction Battalion, and 11th Special Naval Construction Battalion, reinforced)
          71st Naval Construction Battalion
          1st Separate Engineer Battalion
            8024 Aviation Engineer Battalion (USA)

    Corps Service Group

          Headquarters, Service Group
          Headquarters, Shore Party
          Company D, 1st Military Police Battalion, FMFPac
          11th Motor Transport Battalion, FMFPac
            7th Field Depot, reinforced

    1st Bomb Disposal Company (less 2d and 3d Platoons)

        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
  2. Corps Artillery . . . . . . BrigGen David R. Nimmer
        Headquarters Battery, Corps Artillery

          6th 155mm Howitzer Battalion
          8th 155mm Gun Battalion
            9th 155mm Gun Battalion

    Headquarters Battery, 2d Provisional Field Artillery Group

          1st 155mm Howitzer Battalion
          3d 155mm Howitzer Battalion
            7th 155mm Gun Battalion

    456th Amphibian Truck Company (USA)

      Marine Observation Squadron 7
  3. 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
  4. 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)

 

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        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
  1. 1st Marine Division (Reinforced) . . . . . MajGen Pedro A. del Valle
        Division Troops

          Headquarters Battalion (less 1st Military Police Company)
          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 Platoon

    Combat Team 1

          1st Marines
          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)

    Combat Team 5

          5th Marines
          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 Company

    Combat Team 7

          7th Marines
          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 Company

    Artillery Group

            11th Marines

              3d Amphibian Truck Company

    Detachment, 454th Amphibian Truck Company (USA)

          Marine Observation Squadron 3
          Detachment, 1st Amphibian Tractor Battalion
            Detachment, 8th Amphibian Tractor Battalion

    Armored Amphibian Tractor Group

            3d Armored Amphibian Tractor Battalion (Provisional)

    Tank Group

          1st Tank Battalion
          Detachment, 1st Amphibian Tractor Battalion
          Detachment, 8th Amphibian Tractor Battalion
            Tank Maintenance Platoon, Ordnance Company, 1st Service Battalion

    Engineer Group

          1st Engineer Battalion (less Companies A, B, and C)
            145th Naval Construction Battalion (less detachments)

    Shore Party Group

          1st Pioneer Battalion (less Companies A, B, and C)
          One-half, 11th Special Naval Construction Battalion
          Detachment, 145th Naval Construction Battalion
          Detachment, 4th Joint Assault Signal Company
            Replacement Group

    Service Group

          1st Service Battalion (less detachments)
          1st Motor Transport Battalion (less Companies A, B, and C )
            2d Platoon, 1st Laundry Company

    Military Police Group

          1st Military Police Company (less 1st, 2d, and 3d Platoons)
        Company B, 1st Provisional Military Police Battalion (USA)

 

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  1. 6th Marine Division (Reinforced) . . . . . . MajGen Lemuel C. Shepherd, Jr.
        Division Troops

          Headquarters Battalion (less detachments)
          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 Team

    Combat Team 4

          4th Marines (less 2d Battalion (less Company E) )
          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 Company

    Combat Team 22

          22d Marines
          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 Company

    Division Artillery Group

          15th Marines
          Detachment, 6th Amphibian Truck Company
          Detachment, 814th Amphibian Truck Company (USA)
            Marine Observation Squadron 6

    Armored Amphibian Group

          1st Armored Amphibian Battalion
            3-9-A Unit

    Tank Group

          6th Tank Battalion (less Company A)
            Tank Maintainance Platoon, Ordnance Company, 6th Service Battalion

    1st Amphibian Tractor Group

            9th Amphibian Tractor Battalion

    2d Amphibian Tractor Group

            4th Amphibian Tractor Battalion

    Engineer Group

          6th Engineer Battalion (less detachments)
            58th Naval Construction Battalion (less detachments)

    Shore Party Group

          6th Pioneer Battalion (less detachments)
          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)

    Service Group

          6th Service Battalion (less detachments)
          6th Motor Transport Battalion (less detachments)
            6th Medical Battalion (less detachments) (Attached: G-10 and G-11 Dispensary Units)

    Division Reserve

          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

 

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        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

 

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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.