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Appendix A: Major Tactical Units of Tenth Army In the Ryukyus Campaign

The following list shows the organization of Tenth Army and its major tactical components as they entered combat. The components omitted are the Island Command, which had a nontactical mission; the 81st Infantry Division, which did not participate in the battle; and the ad Marine Division, of which only the 8th Marine Regiment landed on Okinawa, late in the campaign.

The list was compiled from Tenth Army Action Report, Ryukyus. Discrepancies found in this Action Report have been eliminated, but, despite careful research and checking, other minor errors may still exist. Such errors will be corrected in the Order of Battle of the United States Army, World War II, now being prepared for this series.

Tenth Army

Hq Tenth Army

SPECIAL TROOPS

Hq & Hq Det, Sp Trs, Tenth Army

163rd Liaison Sq (AAF)

1st Depot Unit (AAF)

3236th, 3240th Sig Serv Dets (FA)

3040th QM Car Co (-2 Plats)

Psychological Warfare Tm

143rd–152nd Photo Interp Tms

Base Censorship Det

32nd, 33rd Japanese Ord of Btl Tms

1st Info & Hist Serv

K Hist Unit

Civ Correspondent Gp

303rd, 304th Hq Int Dets

105th, 901st, 902nd, 903rd Army Postal Units

357th Provisional Army Postal Unit

310th Counter intelligence Corps Det

Ten Counter Intelligence Corps Opns Tms

Two Counter Intelligence Corps Hq & Adm Tms

ARMORED

20th Armored Gp

COAST ARTILLERY (AA)

Hq & Hq Btry, Tenth Army (AAA)

Hq & Hq Btry, 53rd AAA Brig

Hq & Hq Btrys, 43rd, 44th, 97th, 136th, 137th AAA Gps

96th, 98th, 369th, 503rd, 505th, 948th AAA Gun Bns, Semimobile

834th AAA Auto Wpns Bn, Self-propelled

866th AAA Auto Wpns Bn (-A, B, & C Btrys)

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779th, 870th AAA Auto Wpns Bn, Semimobile

294th, 295th, 325th AAA Searchlight Bns

Hq & Hq Btry, 230th AAA Searchlight Bn

A Btry, 230th AAA Searchlight Bn

1st Plat, C Btry, 230th AAA Searchlight Bn

162nd AAA Opns Det

COAST ARTILLERY (HD)

Hq & Hq Btry, 144th CA Gp (155-mm Gun)

38th, 179th, 282nd CA Bns (155-mm Gun)

ENGINEER

1746th Engr Map Det

SIGNAL

3rd, 82nd Sig Construction Bns, Light

85th Sig Opn Bn

3181st Sig Serv Bn, Mobile

3161st Sig Serv Co

241st Sig Opn Co

Det, 585th Sig Depot Co

Det, 57th Sig Repair Co

529th Sig Opn Co

3385th Sig Serv Tm, Bn Hq

3373rd Sig Serv Co (SIAM)

Provisional Radio Int Co

8th, 108th, 110th, 111th, 274th Sig Radar Maintenance Units

279th Pigeon Combat Plat

MEDICAL

Hq Provisional Serv Unit

366th Orthopedic Tm

376th, 377th Surgical Tms

390th Neuro Surgical Tm, 341st

342nd, 343rd Surgical Dets

Hq & Hq Det, 80th Med Gp

Hq & Hq Dets, 96th, 153rd Med Bns

665th, 668th Clearing Cos

386th, 444th, 541st, 646th Collecting Cos

843rd, 847th Supply Tms

176th Malaria Control Unit

215th Malaria Survey Unit

MISCELLANEOUS

713th Armd Flame Thrower Bn

Air Delivery Sec, III Phib Corps

2nd Landing Force Air Support Control Unit

XXIV Corps

Hq XXIV Corps

CORPS TROOPS

Hq Co, XXIV Corps

XXIV Corps Military Police Plat

519th Military Police Bn (-Cos A & B)

235th Army Postal Unit

139th–142nd, 161st Photo Interp Tms

3231st Photo Unit

306th, 307th Hq Int Dets

L Hist Unit

29th Japanese Ord of Btl Tm

Base Censorship Det

224th Counter Intelligence Corps Det

Civ Correspondent Gp

MEDICAL

Hq & Hq Det, 71st Med Bn, Separate

594th QM Laundry Co (-3 Plats)

556th Ambulance Co, Separate, Motorized

394th Clearing Co, Separate

644th, 645th Collecting Cos

214th Malaria Survey Unit (FB)

2nd Supply Tm Type #4, 726th Med Det

377th Surgical Det

366th Orthopedic Tm (EB)

MILITARY GOVERNMENT UNITS

Three Military Govt Dets

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1st–3rd G-10 Dispensaries (USN)

2nd G-6 Hospital (USN)

FIELD ARTILLERY

Hq & Hq Btry, XXIV Corps Arty

Hq & Hq Btry, 419th FA Gp

145th, 198th, 225th FA Bns ( 155-mm How)

287th FA Observation Bn

ENGINEER

Hq & Hq Co, 1176th Engr Construction Gp

47th, 1397th, 1398th Engr Construction Bns

Provisional Engr Topographic Plat

1445th Engr Searchlight Maintenance Co

968th Engr Maintenance Co

1088th Engr Depot Co (-1st & 2nd Plats)

1901st Engr Aviation Bn

QUARTERMASTER

Hq & Hq Det, 521st QM Gp

Hq & Hq Det, 187th QM Bn, Mobile

Hq & Hq Det, 492nd QM Bn

247th QM Depot Supply Co (-3rd Plat)

244th QM Depot Supply Co (-1st & 2nd Plats)

4342nd QM Serv Co (-2nd Plat)

3063rd QM Graves Reg Co (-3 Plats)

3008th QM Graves Reg Co (-4 Plats)

3754th QM Truck Co (-3 Plats)

SIGNAL

101st Sig Bn

MISCELLANEOUS

3rd Landing Force Air Support Control Unit

Det, Air Warning Sq #7

Hq & Hq CO, 504th Port Bn

88th Chem Mortar Bn (-Cos A & B)

866th AAA Auto Wpns Bn

III Amphibious Corps

CORPS TROOPS

Hq & Serv Bn, III Phib Corps

Sig Bn, III Phib Corps

Med Bn, III Phib Corps

Hq Btry, III Phib Corps Arty

11th Mil Transport Bn, Fleet Marine Force, Pacific

1st Provisional Military Police Bn, Fleet Marine Force, Pacific

Co A, 51st Military Police Bn (USA)

2nd, 3rd Corps Evacuation Hospitals

456th Amphibious Truck Co (USA)

1st Bomb Disposal Co (-2 Plats)

3rd Separate Radio Int Plat

1st Landing Force Air Support Control Unit

43-D Mobile Communication Unit

Det, Air Warning Sq

Two Military Govt Dets (USA)

12th G-10 Dispensary (USN)

1st G-6 Hospital (USN)

1st Laundry Co (-1st, 2nd, & 3rd Plats)

Hq Corps Shore Party

7th Field Depot

Hq Co

Guard Co

Sig Co

Engr Co

Ord Co

General Supply Co

Military Transport Co

Six Depot Cos

3rd, 12th Ammunition Cos

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2nd Plat, 2nd Laundry Co

Fumigation & Bath Co

1st Provisional AAA Gp

2nd, 5th, 8th, 16th AAA Bns

2nd Provisional FA Gp, Hq Btry

1st, 3rd, 6th 155mm How Bns

7th, 8th, 9th 155mm Gun Bns

802nd Engr Aviation Bn (USA)

1st Separate Engr Bn

71st, 130th Naval Construction Bns (USN)

7th Infantry Division

ORGANIC UNITS

Hq 7th Inf Div

Special Troops, 7th Inf Div

Hq Co, 7th Inf Div

Military Police Plat, 7th Inf Div

Band, 7th Inf Div

7th QM Co

7th Cav Rn Tr (Mechanized)

7th Sig Co

707th Ord Light Maintenance Co

7th Med Bn

13th Engr (C) Bn

Hq & Hq Btry, Div Arty

31st, 48th, 49th, 57th FA Bns

17th, 32nd, 184th Inf Rgts

ATTACHED UNITS (AS OF L DAY)

Antiaircraft Artillery

502nd AAA Gun Bn

861st AAA Auto Wpns Bn

1st Plat, A Btry, 295th AAA Searchlight Bn

Det, Air Warning Sq #8

Armored

711th Tank Bn, Medium

718th, 536th Amph Tractor Bn

776th Amph Tank Bn

Chemical

91st Chem Co

Supply Tm, 1st Provisional Chem Det

Engineer

Hq & Hq Co, 1140th Engr (C) Gp

50th, 104th, 110th Engr (C) Bns

1st Plat, 1088th Engr Depot Co

Medical

69th Field Hospital

52nd, 66th Portable Surgical Hospitals

One Orthop Tm, 366th Med Serv Det

376th Surgical Tm

390th Neuro Surgical Tm

5th Museum & Med Arts Det

Ordnance

644th Ord Ammunition Co

Det, 196th Ord Depot Co

204th Ord Bomb Disposal Sq

284th Ord Heavy Maintenance Co, Tank

Quartermaster

40th QM War Dog Plat

3260th QM Serv Co

191st QM Gas Supply Co

1st & 3rd Plats, 3754th QM Truck Co

1st Sec, 2nd Plat, 4342nd QM Serv Co

472nd, 481st Amph Truck Cos

1st & 2nd Plats, 244th QM Depot Supply Co

2nd Plat, 3008th QM Graves Reg Co

Transportation

200th, 291st Port Cos

Miscellaneous

7th Counter Intelligence Corps Det

156th Photo Interp Tm

Base Censor Det

Civ Correspondent Gp

310th Hq Int Det

News Tm A, 1st Info & Hist Serv

Two Military Govt Dets

4th, 5th G-10 Dispensaries (USN)

32nd, 33rd Photo Assignment Units

Co A, 519th Military Police Bn

74th Joint Assault Sig Co

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77th Infantry Division

ORGANIC UNITS

Hq 77th Inf Div

Special Troops, 77th Inf Div

Hq Co, 77th Inf Div

Military Police Plat, 77th Inf Div

Band, 77th inf Div

77th QM Co

77th Cav Recon Tr (Mechanized)

77th Sig Co

777th Ord Light Maintenance Co

302nd Med Bn

302nd Engr (C) Bn

Hq & Hq Btry, Div Arty

304th, 305th, 306th, 902nd FA Bns

305th, 306th, 307th Inf Regts

ATTACHED UNITS (AS OF L MINUS 5)

Antiaircraft Artillery

93rd AAA Gun Bn

204th Radar Maintenance Unit

7th AAA Auto Wpns Bn

2nd Plat, Btry A, 295th AAA Searchlight Bn

Armored

706th Tank Bn (Medium)

708th Amph Tank Bn

715th, 773rd Amph Tractor Bn

Chemical

Supply Tm, 1st Provisional Chem Det

Co A, 88th Chem Mortar Bn

Engineer

Hq & Hq Co, 1118th Engr (C) Gp

132nd, 233rd, 242nd Engr (C) Bns

Ordnance

693rd Ord Ammunition Co

92nd Bomb Disposal Sq

Det, 196th Ord Depot Co

Medical

36th Field Hospital

68th, 95th Portable Surgical Hospitals

Det, 75th Station Hospital

Quartermaster

43rd QM War Dog Plat

2nd Plat, 3063rd QM Graves Reg Co

477th, 828th Amph Truck Cos

203rd, 292nd Port Cos

Military Government

Three Military Govt Dets

6th, 7th G-10 Dispensaries (USN)

Field Artillery

Hq & Hq Btry, 420th FA Gp

531st, 43ad FA Bns (155-mm Gun)

Miscellaneous

36th Japanese Ord of Btl Tm

292nd Joint Assault Sig Co

Co B, 724th Military Police Bn

Provisional Radio Intelligence Co

Det 62nd, 7th Weather Sq

Det, Air Warning Sq #8

Amphibious Recon Bn, Fleet Marine, Force, Pacific (-Co B)

3234th Photo Assignment Unit

158th Photo Interp Tm

312th Hq Intelligence Det

Base Censor Det

77th Counter Intelligence Corps Det

Civ Correspondent Gp

News Team Co, 1st Info & Hist Serv

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96th Infantry Division

ORGANIC UNITS

Hq, 96th Inf Div

Special Troops, 96th Inf Div

Hq Co, 96th Inf Div

Military Police Plat, 96th Inf Div

Band, 96th Inf Div

96th QM Co

96th Cav Recon Tr (Mechanized)

96th Sig Co

796th Ord Light Maintenance Co

321st Med Bn

321st Engr (C) Bn

Hq & Hq Btry, Div Arty

361st, 362nd, 363rd, 921st FA Bns

381st, 382nd, 383rd Inf Regts

ATTACHED UNITS (AS OF L DAY)

Antiaircraft Artillery

504th AAA Gun Bn

485th AAA Auto Wpns Bn

Btry C, 294th AAA Searchlight Bn (-1 Plat)

Det, Air Warning Sq #8

Armored

763rd Tank Bn

780th Amph Tk Bn

728th, 788th Amph Tractor Bn

Chemical

Supply Tm, 1st Provisional Chem Det

Co B, 88th Chem Mortar Bn

Engineer

Hq & Hq Co, 1122nd Engr (C) Gp

170th, 173rd, 174th Engr (C) Bns

2nd Plat, 1088th Engr Dep Co

Medical

31st Field Hospital

51st, 67th Portable Surgical Hospitals

Det, 233rd General Hospital

Ordnance

632nd Ord Ammunition Co

206th Ord Bomb Disposal Sq

Det, 196th Ord Depot Co

Quartermaster

41st QM War Dog Plat

3240th QM Serv Co

2nd Sec, 2nd Plat, 4342nd QM Serv Co

3rd Plat, 3008th QM Graves Reg Co

3rd Plat, 3063rd QM Graves Reg Co

474th, 827th Amph Truck Co

204th, 293rd Port Cos

Military Government

Two Military Govt Dets

8th, 9th G-10 Dispensaries (USN)

Miscellaneous

160th Photo Interp Tm

3235th Photo Assignment Unit

314th Hq Intelligence Det

38th Japanese Ord of Btl Tm

Base Censor Det

Civ Correspondent Gp

News Tm B, 1st Info & Hist Serv

96th Counter Intelligence Corps Det

Co C, 519th Military Police Bn

5934 Joint Assault Sig Co

27th Infantry Division

ORGANIC TROOPS

Hq 27th Inf Div

Special Troops, 27th Inf Div

Hq CO, 27th Inf Div

Military Police Plat, 27th Inf Div

Band, 27th Inf Div

27th Cav Rcn Tr (Mechanized)

27th QM Co

27th Sig Co

727th Ord Light Maintenance Co

102nd Med Bn

102nd Engr (C) Bn

Hq & Hq Btry, Div Arty

104th, 105th, 106th, 249th FA Bns

105th, 106th, 165th Inf Regts

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ATTACHED UNITS (AS OF L PLUS 14)

Armored

193rd Tank Bn (Medium)

Engineer

Hq & Hq Co. 1165th Engr (C) Gp

34th, 152nd, 1341st Engr (C) Bns

Medical

68th Field Hospital

96th, 98th Portable Surgical Hospitals

219th Malaria Survey Unit

122nd Malaria Control Unit Ordnance

61st Ord Ammunition Co.

Quartermaster

45th QM War Dog Plat

1st Plat, 3063rd QM Graves Reg Co

Military Government

15th, 16th G-10 Dispensaries (USN)

One Military Govt Det

Miscellaneous

157th Photo Interp Tm

311th Hq Intelligence Det

Civ Correspondent Gp

35th Japanese Ord or Btl Tm

News Team E, 1st Info & Hist Serv

27th Counter Intelligence Corps Det

594th Joint Assault Sig Co

1st Marine Division

ORGANIC UNITS

Hq Bn, 1st Marine Div

1st Tank Bn

1st Pioneer Bn

1st Engr Bn

1st Serv Bn

1st Med Bn

1st Motor Transport Bn

11th Marines (Arty Regt)

1st, 5th, 7th Marines (Inf Regt)

ATTACHED UNITS (AS OF L DAY)

4th Joint Assault Sig Co

Det, Air Warning Sq

Co B, 51st Military Police Bn (USA)

3rd, 454th Amph Truck Cos

3rd Provisional Armd Amph Bn

1st, 8th Amph Tractor Bns

4th War Dog Plat

4th Provisional Rocket Det

3rd Marine Observation Sq

2nd Plat, 1st Bomb Disposal Co

2nd Plat, 1st Laundry Co

Two Military Govt Dets (USA)

17th, 18th G-10 Dispensaries (USN)

145th Naval Construction Bn (USN)

6th Marine Division

ORGANIC UNITS

Hq Bn, 6th Marine Div

6th Tank Bn

6th Pioneer Bn

6th Engr Bn

6th Serv Bn

6th Med Bn

6th Motor Transport Bn

15th Marines (Arty Regt)

4th, 22nd, 29th Marines (Inf Regts)

ATTACHED UNITS (AS OF L DAY)

6th Joint Assault Sig Co

Det, Air Warning Sq

Co C, 51st Military Police Bn (USA)

6th, 814th Amph Truck Cos

1st Armd Amph Tractor Bn

4th, 9th Amph Tractor Bns

1st War Dog Plat

5th Provisional Rocket Det

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6th Marine Observation Sq

3rd Plat, 1st Bomb Disposal Co

3rd Plat, 1st Laundry Co

Two Military Govt Dets (USA)

10th, 11th G-10 Dispensaries (USN)

58th Naval Construction Bn

11th Spec Naval Construction Bn (-Hq Det & 3 Cos)

Tactical Air Force

ARMY

Hq & Hq Sq, 301st Fighter Wing

318th Fighter Gp

19th, 73rd, 3334 Fighter Sqs

548th Night Fighter Sq

413th Fighter Gp

1st, 21st, 34th Fighter Sqs

507th Fighter Gp

463rd, 464th, 465th Fighter Sqs

337th Air Serv Gp

Hq & Base Serv Sq

371st Engr Sq

577th Materiel Sq

364th Air Serv Gp

Hq & Base Serv Gp

612th Engr Sq

622nd Materiel Sq

557th Air Serv Gp

Hq & Base Serv Sq

987th Engr Sq

992nd Materiel Sq

342nd Station Complement Sq

460th Aviation Sq

Hq & Hq Sq, VII Bomber Command

11th Bomb Gp, Heavy

26th, 42nd, 98th, 431st Bomb Sqs

494th Bomb Gp, Heavy

864th, 865th, 866th, 867th Bomb Sqs

41st Bomb Gp, Medium

47th, 48th, 396th, 820th Bomb Sqs

13th Air Serv Gp

Hq & Base Serv Sq

489th Engr Sq

610th Materiel Sq

57th Air Serv Gp

Hq & Base Serv Sq

613th Engr Sq

619th Materiel Sq

389th Air Serv Gp

Hq & Base Serv Sq

593rd Engr Sq

594th Materiel Sq

MARINE

Hq Sq, Marine Air Wing-2

Marine Air GP-33

Hq Sq-33

Serv Sq-33

VMF-312, 322, 323 (Marine Fighter Sqs)

VMF-543 (Marine Fighter Sq, Night)

VMTB-232 (Marine Torpedo Bomber Sq)

Marine Air GP-31

Serv Sq-31

VMF-224, 311, 441 (Marine Fighter Sqs)

VMF-542 (Marine Fighter Sq, Night)

Marine Air Gp-14

Hq Sq-14

Serv Sq-14

VMF-212, 222, 223 (Marine Fighter Sqs)

Marine Air GP-22

Hq Sq-22

Serv Sq-22

VMF-113, 314, 422 (Marine Fighter Sqs),

VMF-533 (Marine Fighter Sq, Night),

Marine Observation Sq-7