Appendix VI
Southern Troops and Landing Force Order of Battle for Guam¹

FORCE TROOPS--Major General Roy S. Geiger

Headquarters and Service Battalion, III Amphibious Corps (less detachments)
Signal Battalion, III Amphibious Corps (less detachments)
4th Marine Ammunition Company
Detachment, Argus 17 (Shore-based Fighter Director Unit)
Detachment, Marine Air Warning Squadron-2
Detachment, 756th Air Warning Company (Army)
Communication Unit 41 (Navy)

III AMPHIBIOUS CORPS ARTILLERY--Brigadier General Pedro A. del Valle

Headquarters and Headquarters and Service Battery, III Amphibious Corps Artillery
1st 155mm Howitzer Battalion (less Battery C attached to Brigade Artillery Group on landing)
2d 155mm Howitzer Battalion
7th 155mm Gun Battalion

3D MARINE DIVISION (Reinforced)--Major General Alan H. Turnage

1. 9th Combat Team
   9th Marines
   1st Battalion (less Companies B and C), 19th Marines (Engineers)
   Company D, 19th Marines (Pioneers)
   Company G, 25th Naval Construction Battalion (plus detachment, Headquarters Company)
   3d Tank Battalion (less Companies B and C)
   Reconnaissance Company (less 2 platoons), 3d Headquarters Battalion
   1st Messenger Dog Section (less 1 squad), 2d War Dog Platoon
   1st Scout Dog Section (less 1 squad), 3d War Dog Platoon
   Company A, 3d Motor Transport Battalion
   Company A, 3d Medical Battalion
   1st Band Section
   Detachment, 3d Joint Assault Signal Company

2. 21st Combat Team
   21st Marines
   Company B, 19th Marines (Engineers)
   2d Battalion (less Companies D and F), 19th Marines (Pioneers)
   Company H, 25th Naval Construction Battalion (plus detachment, Headquarters Company)
   1st and 2d Platoons, Company B, 3d Tank Battalion
   2d Platoon, Reconnaissance Company, 3d Headquarters Battalion
   2d Messenger Dog Section (less 1 squad), 2d War Dog Platoon
   2d Scout Dog Section (less 1 squad), 3d War Dog Platoon
   Company B, 3d Motor Transport Battalion
   Company B, 3d Medical Battalion
   2d Band Section
   Detachment, 3d Joint Assault Signal Company

3. 3d Combat Team
   3d Marines
   Company C, 19th Marines (Engineers)
   Company F, 19th Marines (Pioneers)
   25th Naval Construction Battalion (less Companies G and H and 2 detachments, Headquarters Company)
   Company C, 3d Tank Battalion
   3d Messenger Dog Section (less 1 squad), 2d War Dog Platoon
   3d Scout Dog Section (less 1 squad), 3d War Dog Platoon
   Company C, 3d Motor Transport Battalion
   Company C, 3d Medical Battalion
   3d Band Section
   Detachment, 3d Joint Assault Signal Company

4. 12th Marines (Reinforced)
   12th Marines
   14th Defense Battalion (less 155mm Seacoast Artillery group, 2 90mm batteries, 1 searchlight platoon, and detachments, Headquarters and Service Battery)
   Artillery Liaison Group, III Amphibious Corps

5. 1st Armored Amphibian Battalion (less Companies A and B )

6. 3d Amphibian Tractor Battalion (Reinforced)

7. Motor Transport Battalion (less Company C), III Amphibious Corps (DUKW's)

8. Reserve Group
   3d Headquarters Battalion [less 3 Band Sections and 3d Reconnaissance Company (less 4th Platoon)]
   Company B (less 2 platoons), 3d Tank Battalion
   2d War Dog Platoon (less 6 squads)
   3d War Dog Platoon (less 6 squads)
   3d Joint Assault Signal Company (less detachments)
   Detachment, Signal Battalion, III Amphibious Corps

9. Engineer Group
   19th Marines (less 1st and 2d Battalions)
   2d Separate Engineer Battalion
   Company B, 2d Special Naval Construction Battalion
   Garrison Beach Party

10. Service Group
    3d Service Battalion (less detachments)
    3d Medical Battalion (less Companies A, B, and C)
    3d Motor Transport Battalion (less Companies A, B, and C )
    Detachment, Service Group, 5th Field Depot
    2d Marine Ammunition Company (less 4th Platoon)

1ST PROVISIONAL MARINE BRIGADE (Reinforced)--Brigadier General Lemuel C. Shepherd, Jr.

1. Brigade Troops
   Headquarters and Headquarters Company, 1st Provisional Marine Brigade
   Military Police Company (less 1st and 2d Platoons), 1st Provisional Marine Brigade
   Signal Company (less detachments), 1st Provisional Marine Brigade

2. 4th Combat Team
   4th Marines
   Tank Company, 4th Marines
   Engineer Company, 4th Marines
   Pioneer Company, 4th Marines
   Medical Company, 4th Marines
   Motor Transport Company, 4th Marines
   Reconnaissance Platoon, 4th Marines
   Ordnance Platoon, 4th Marines
   Service and Supply Platoon, 4th Marines
   1st Platoon, Military Police Company, 1st Provisional Marine Brigade
   4th Platoon, 2d Marine Ammunition Company
   Detachment, 5th Field Depot
   1st War Dog platoon
   1st Joint Assault Signal Party, Signal Company, 1st Provisional Marine Brigade

3. 22d Combat Team
   22d Marines
   Tank Company, 22d Marines
   Pioneer Company, 22d Marines
   Engineer Company, 22d Marines
   Medical Company, 22d Marines
   Motor Transport Company, 22d Marines
   Reconnaissance Platoon, 22d Marines
   Ordnance Platoon, 22d Marines
   Service and Supply Platoon, 22d Marines
   Band Section, 22d Marines
   2d Platoon, Military Police Company, 1st Provisional Marine Brigade
   1st Provisional Replacement Company
   Detachment, 5th Field Depot
   Construction Battalion Maintenance Unit 515 (Navy)
   2d Joint Assault Signal Party, Signal Company, 1st Provisional Marine Brigade

4. Companies A and B, 1st Armored Amphibian Battalion

5. Amphibian Tractor Group
   4th Amphibian Tractor Battalion (Reinforced)
   Company C, Motor Transport Battalion, III Amphibious Corps (DUKW's)

6. Artillery Group
   Artillery Headquarters Detachment, 1st Provisional Marine Brigade
   75mm Pack Howitzer Battalion, 4th Marines
   75mm Pack Howitzer Battalion, 22d Marines
   305th Field Artillery Battalion (attached on landing)
   Battery C, 1st 155mm Howitzer Battalion (attached on landing)

7. 305th Combat Team (USA)
   305th Infantry
   305th Field Artillery Battalion (detached on landing)
   Battery A, 7th Antiaircraft Artillery (Automatic Weapons) Battalion (detached on landing)
   Company C, 706th Tank Battalion (less 1 platoon)
   242d Engineer Combat Battalion
   Company A, 302d Engineer Combat Battalion
   Company A and 1 platoon, Company D, 302d Medical Battalion
   1 platoon, Company A, 88th Chemical Battalion
   Detachment, 77th Signal Company
   Detachment, 777th Ordnance Company
   Detachment, 292d Joint Assault Signal Company
   Detachment, Prisoner of War Interrogation Team

8. Antiaircraft Group
   9th Defense Battalion (less 155mm Seacoast Artillery Group, 90mm Antiaircraft Group, and detachments, Headquarters and Service Battery)
   Battery A, 7th Antiaircraft Artillery (Automatic Weapons) Battalion (attached on landing)

9. 53d Naval Construction Battalion

10. Medical Battalion, III Amphibious Corps (Reinforced)

77TH INFANTRY DIVISION (Reinforced) (USA)--Major General Andrew D. Bruce

1. Division Troops
   Headquarters, 77th Infantry Division
   Special Troops

   Headquarters Company, 77th Infantry Division
   Military Police Platoon, 77th Infantry Division
   777th Ordnance Company (Light Maintenance) (less detachments)
   77th Quartermaster Company
   77th Signal Company (less detachments)
   77th Infantry Division Band
   77th Reconnaissance Troop

   Headquarters and Headquarters Battery, 77th Infantry Division Artillery
   306th Field Artillery Battalion
   302d Engineer Combat Battalion (less Companies A, B, and C)
   302d Medical Battalion (less Companies A, B, C, and 1 platoon, Company D)
   36th Field Hospital (less 2 platoons)
   95th Portable Surgical Hospital
   Company A (less 1 platoon), 88th Chemical Battalion
   92d Bomb Disposal Squad
   292d Joint Assault Signal Company (less detachments)
   7th Antiaircraft Artillery (Automatic Weapons) Battalion [less Companies A, B, and C (less 1 platoon)]
   404th Ordnance Company (Medium Maintenance)
   Prisoner of War Interrogation Team (less detachments)
   Detachment, Counter Intelligence Corps
   Joint Intelligence Center, Pacific Ocean Areas Team
   Signal Photo Sections 1 and 2

2. 306th Combat Team
   306th Infantry
   304th Field Artillery Battalion
   Company B, 302d Engineer Combat Battalion
   132d Engineer Combat Battalion
   Detachment, 292d Joint Assault Signal Company
   Company B, 302d Medical Battalion
   Battery B, 7th Antiaircraft Artillery (Automatic Weapons) Battalion
   Detachment, 77th Signal Company
   Detachment, 777th Ordnance Company
   Company B, 706th Tank Battalion
   1st Platoon, 36th Field Hospital

3. 307th Combat Team
   307th Infantry
   902d Field Artillery Battalion
   Company C, 302d Engineer Combat Battalion
   233d Engineer Combat Battalion
   Detachment, 292d Joint Assault Signal Company
   Company C, 302d Medical Battalion
   Battery C, 7th Antiaircraft Artillery (Automatic Weapons) Battalion
   Company A, 706th Tank Battalion
   Detachment, 77th Signal Company
   Detachment, 777th Ordnance Company
   2d Platoon, 36th Field Hospital

GARRISON FORCE (when released by Southern Troops and Landing Force)--Major General Henry C. Larsen

1st Provisional Base Headquarters Battalion
3d Marine Division (Reinforced)
14th Defense Battalion (less detachments)
9th Defense Battalion (less detachments)
2d Special Engineer Battalion
25th Naval Construction Battalion
53d Naval Construction Battalion
Company B, 2d Special Naval Construction Battalion
Communication Unit 41
5th Field Depot
Detachment, 5th Naval Construction Brigade
Detachment, Marine Air Group 21
Detachment, Lion 6 Advance Naval Base
Detachment, Argus 17
Detachment, Marine Air Warning Squadron 2
Detachment, 746th Air Warning Company
Army defense troops
Other units as assigned.

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Footnote

1. Order of Battle information was taken from task organization appendices of the operation plans of units assigned to STLF and shows only those units assigned at the time of the landing.