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
Transcribed and formatted for HTML by Patrick Clancey, HyperWar Foundation