United States Order of Battle at Iwo Jima

United States Marine Corps

(Where multiple commanders a listed for a unit, these are replacements due to casualties)

Fifth Amphibious Corps, Major General Harry Schmidt

Third Division, Major General Graves B. Erskine

9th Regiment, Colonel Howard N. Kenyon

First Battalion, Lt Col Carey A. Randall/Major William T. Glass/Lt Col Jack F. Warner

Second Battalion, Lt Col Robert E Chusman, Jr.

Third Battalion, Lt Col Harold C. Boehm

21st Regiment, Colonel Hartnoll J. Withers

First Battalion, Lt Col Marlowe C. Williams/Major Clay M. Murray/Major Robert H. Houser/

Second Battalion, Lt Col Lowell E. English/Major George S. Percy

Third Battalion, Lt Col Wendell H. Duplantis

12th Regiment [Artillery], Lieutenant Colonel Raymond F. Crist, Jr.

First Battalion, Major George B. Thomas

Second Battalion, Lt Col William T. Fairbourn

Third Battalion, Lt Col Alpha L. Bowser, Jr.

Fourth Battalion, Major Joe B. Wallen

3rd Tank Battalion, Major Holly H. Evans

3rd Engineer Battalion, Lt Col Walter S. Campbell

3rd Pioneer Battalion, Lt Col Edmund M. Williams

3rd Service Battalion, Lt Col Paul G. Chandler

3rd Motor Transport Battalion, Lt Col Ernest W. Fry, Jr.

3rd Medical Battalion, Commander Anthony E. Reymont, USNR

3rd Joint Assault Signal Company (JASCO)

Marine Observation Squadron 1

3rd War Dog Platoon

JICPOA Intelligence Team

Fourth Division, Major General Clifton B. Cates:

23rd Regiment, Colonel Walter W. Wensinger

First Battalion, Lt Col Ralph Haas/Lt Col Louis B. Blissard

Second Battalion, Major Robert H. Davidson/Lt Col Edward J. Dillon

Third Battalion, Major James F. Scales

24th Regiment, Colonel Walter I. Jordan

First Battalion, Major Paul S. Treitel/Lt Col Austin R. Brunelli

Second Battalion, Lt Col Richard Rothwell

Third Battalion, Lt Col Alexander A. Vandegrift, Jr./Major Doyle A. Stout

25th Regiment, Colonel John R. ("Pat") Lanigan

First Battalion, Lt Col Hollis U. Mustain/Major Fenton J. Mee

Second Battalion, Lt Col Lewis C. Hudson, Jr./Lt Col James Taul

Third Battalion, Lt Col Justice M. Chambers/Capt James C. Headley

14th Regiment [Artillery], Colonel Louis G. De Haven

First Battalion, Major John B. Edgar, Jr.

Second Battalion, Major Clifford B. Drake

Third Battalion, Lt Col Robert E. MacFarlane/Major Harvey A. Freehan/Lt Col Carl A. Youngdale

Fourth Battalion, Lt Col Carl A. Youngdale/Major Roland J. Spritzen

4th Tank Battalion, Lt Col Richard K. Schmidt

4th Engineer Battalion, Lt Col Nelson K. Brown

4th Pioneer Battalion, Lt Col Richard G. Ruby

4th Service Battalion, Lt Col John E. Fondahl

4th Motor Transport Battalion, Lt Col Ralph L. Schlesswohl

4th Medical Battalion, Commander Reuben L. Sharp, USNR

5th Amphibian Tractor Battalion, Major George L. Shead

10th Amphibian Tractor Battalion, Major Victor . Croizat

1st Joint Assault Signal Company (JASCO)

Marine Observation Squadron 4

7th War Dog Platoon

1st Provisional Rocket Detachment

JICPOA Intelligence Team

Fifth Division, Major General Keller E. Rockey

26th Regiment, Colonel Chester B. Graham

First Battalion, Lt Col Daniel C. Pollock/Major Albert V.K. Gary

Second Battalion, Lt Col Joseph P. Sayers/Major Amedeo Rea

Third Battalion, Lt Col Tom M. Trotti/Major Richard Fagan

27th Regiment, Colonel Thomas A. Wornham

First Battalion, Lt Col John A. Butler/Lt Col Justin G. Duryea/Major William H. Tumbelston/Major William H. Kennedy, Jr.

Second Battalion, Major John W. Antonelli/Major Gerald F. Russell

Third Battalion, Lt Col Donn J. Robertson

28th Regiment, Colonel Harry B. Liversedge

First Battalion, Lt Col Jackson B. Butterfield

Second Battalion, Lt Col Chandler W. Johnson/Major Thomas B. Pearce, Jr.

Third Battalion, Lt Colonel Charles E. Shepard, Jr./Major Tolson A. Smoak

13th Regiment [Artillery], Colonel James D. Waller

First Battalion, Lt Col John S. Oldfield

Second Battalion, Major Carl W. Hjerpe

Third Battalion, Lt Col Henry T. Waller

Fourth Battalion, Major James F. Coady

Service Troops, Colonel Benjamin W. Gally

5th Tank Battalion, Lt Col William R. Collins

5th Engineer Battalion, Lt Col Clifford H. Shuey

5th Pioneer Battalion, Major Robert S. Riddell

5th Service Battalion, Major Francis P. Daly/Major Gardelle Lewis

5th Motor Transport Battalion, Major Arthur F. Torgler, Jr.

5th Medical Battalion, Lt Commander William W. Ayres, USNR

3rd Amphibian Tractor Battalion, Lt Col Sylvester Stephan

11th Amphibian Tractor Battalion, Lt Col Albert J. Roose

5th Joint Assault Signal Company (JASCO)

Marine Observation Squadron 5

6th War Dog Platoon

3rd Provisional Rocket Detachment

JICPOA Intelligence Team

VAC (Major Attached Units)

Corps Troops Commander, Colonel Alton A. Gladden

1st Provisional Field Artillery Group, Colonel John S. Letcher

8th Field Depot, Colonel Leland S. Swindler

Air Support Control Unit, Colonel Vernon E. Megee

Signal Battalion, Lieutenant Colonel Alfred F. Robertshaw

Medical Battalion, Lieutenant Commander William B. Clapp, USNR

Provisional Signal Corps, Lieutenant Colonel Harry W.G. Vadnals

2nd Separate Engineer Battalion, Lieutenant Colonel Charles O. Clark

2nd Armored Amphibian Battalion, Lieutenant Colonel Reed M. Fawell, Jr.

Evacuation Hospital No. 1, Captain H.G. Young, USN

2nd Bomb Disposal Company

Company B, Amphibious Reconnaissance Battalion

Medical Section, Civil Affairs

JICPOA Intelligence Team

JICPOA Enemy Material and Salvage Platoon

United States Navy

Fifth Fleet, Admiral Raymond A. Spruance (USS Indianapolis )

Task Force 51 [Joint Expeditionary Force], Vice Admiral Richmond K. Turner

Task Group 51.1 [Joint Expeditionary Force Reserve], Commodore Donald W. Loomis

Task Group 51.2 [Transport Screen], Captain Frederick Moosbrugger

Task Group 51.3 [Service and Salvage Group], Captain Curtiss

Task Group 51.4 [Hydrographic Survey Group], Commander Sanders

Task Group 51.5-9 [Defense and Garrison Groups]

Task Group 51.10 [Air Support Control Unit]

Participating Surface Ships (485):

• 4 command ships
• 12 aircraft carriers
• 6 battleships
• 19 cruisers
• 44 destroyers
• 38 destroyer escorts
• 6 destroyer transports
• 44 transports
• 63 LST's (Landing Ship Tank)
• 31 LSM's (Landing Ship Medium)
• 19 cargo ships
• 6 repair ships
• 4 seaplane tenders
• 4 ocean tugs
• 14 destroyer minecraft
• 30 minesweepers
• 5 net layers
• 76 LCI's (Landing Craft Infantry)
• 3 LSD's (Landing Ship Dock)
• 1 LSV (Landing Ship Vehicle)
• 56 assorted patrol, escort, and support vessels

Task Force 52 [Amphibious Support Force], Rear Admiral William H.P. Blandy

Task Force 53 [Attack Force], Rear Admiral Harry W. Hill

Task Force 54 [Gunfire and Covering Force], Rear Admiral Bertram J. Rodgers

Task Force 56 [Expeditionary Troops], Lieutenant General Holland M. Smith, USMC

Task Group 56.1 [Landing Force], Major General Harry Schmidt

Task Group 56.2 [Assault Troops], 4th Marine Division/Major General Clifton B. Cates, 5th Marine Division/Major General Keller E. Rockey

Task Group 56.3 [Expeditionary Troops Reserve], 3rd Marine Division/Major General Graves B. Erskine

Task Force 58 [Fast Carrier Forces], Vice Admiral Marc A. Mitscher (USS Bunker Hill )

Task Group 58.1, Rear Admiral Joseph J. Clark

• Carriers: Hornet, Wasp, Bennington, Belleau Wood
• Battleships: Massachusetts, Indiana
• Cruisers: Vincennes, Miami, San Juan
• 15 destroyers

Task Group 58.2, Rear Admiral Ralph E. Davison

• Carriers: Lexington, Hancock, San Jacinto
• Battleships: Wisconsin, Missouri
• Cruisers: San Francisco, Boston
• 19 destroyers

Task Group 58.3, Rear Admiral Frederick C. Sherman

• Carriers: Essex, Bunker Hill, Cowpens
• Battleships: South Dakota, New Jersey
• Cruisers: Alaska, Indianapolis, Pasadena, Wilkes-Barre, Astoria
• 14 destroyers

Task Group 58.4, Rear Admiral Arthur W. Radford

• Carriers: Yorktown, Randolph, Langley, Cabot
• Battleships: Washington, North Carolina
• Cruisers: Santa Fe, Biloxi, San Diego
• 17 destroyers

Task Group 58.5

• Carriers: Enterprise, Saratoga
• Cruisers: Baltimore, Flint
• 12 destroyers

Seabees

9th Naval Construction Brigade, Captain Robert C. Johnson

41st Naval Construction Regiment [Assault Phase], Commander Paul F. Henderson

• 31st Battalion [assigned to 5th Marine Division], Lt Commander Dominick J. Ermilio
• 133rd Battalion [assigned to 4th Marine Division], Lt Commander Ray P. Murphy
• 62nd Battalion [assigned to VAC], Lt Commander Frank B. Campbell
• 70th Battalion (half-strength: 15 officers, 285 men, barges, pontoons, causeways)

8th Naval Construction Regiment [Second Phase], Commander Rudolph Y. Taggart

• 8th Battalion, Commander W.T. Powers
• 90th Battalion, Commander George S. Brockway
• 95th Battalion, Commander W.L. Johnson
• 23rd Battalion [stevedores], Lt Commander H.W. Heuer
• 301st Battalion [harbor specialists], Commander F.G. Elliot
• 106th Battalion (Section 2), Lt Commander B. Marcus

Logistics

Logistic Support Group, Rear Admiral Donald B. Beary

This groups was mainly for resupply of Task Force 58 with planes, ammunition, fuel, spare parts, and general supplies. It included:
• 15 escort carriers
• 1 cruiser
• 11 destroyers
• 18 destroyer escorts
• 33 tankers
• 4 ocean tugs
• 2 ammunition ships
• 1 general supply ship

Service Squadron 10, Commodore Worrall R. Carter

This squadron of more than 250 ships had headquarters at Ulithi and provided repairs and supplies for all vessels staging through Ulithi, Eniwetok, Guam, and Saipan.

United States Army

Assault Forces

471st Amphibian Truck Company (attached to 5th Marine Division)

473rd Amphibian Truck Company (attached to VAC), Captain Robert P. Schwabl

476th Amphibian Truck Company (attached to 4th Marine Division), Captain Jules Blaustein

138th Anti-Aircraft Artillery Group, Colonel Clarence E. Rothbeb

Headquarters Battery, 138th AAA

506th AA Gun Battalion, Lieutenant Colonel D.M. White

483rd AAAW Battalion, Lieutenant Colonel A. Roth

38th Field Hospital, Reinforced, Major Samuel S. Kirkland

Detachment, 568th Signal Air Warning Battalion (attached to VAC)

Detachments, 726th Signal Warning Company (attached to VAC, 4th & 5th Marine Divisions)

Detachment, 49th Signal Construction Battalion

Detachment 44, 70th Army Airways Communications Systems

Detachment, Communications Unit 434

442nd Port Company (attached to 4th Marine Division)

592nd Port Company (attached to 5th Marine Division)

Garrison Forces, Major General James E. Chaney

Detachment, Island Command Headquarters

Detachment, 147th Infantry Regiment

Detachment, Headquarters 7th Fighter Command

Detachment, Headquarters 15th Fighter Group

47th Fighter Squadron

78th Fighter Squadron

548th Night Fighter Squadron

386th Air Service Group, Special

1st Platoon, 604th Graves Registration Company

223rd Radar Maintenance Unit, Type C

Port Director Detachment

Garrison Beach Party