Pacific Land Forces Order of Battle, August 1945
Sixth Army
6 Ranger Battalion Clark Field, Luzon
158 Infantry RCT Naga, Luzon (Legaspi)
11 Airborne Division Leyte
40 Infantry Division Negros
I Corps Luzon
25 Infantry Division Bambam, Luzon
33 Infantry Division Bagio, Luzon
41 Infantry Division Zamboanga
IX Corps Leyte
77 Infantry Division Cebu
81 Infantry Division Leyte
XI Corps Manila, Luzon
43 Infantry Division Cabanatuan
Americal Infantry Division Cebu
1 Cavalry Division Lucena Batangas, Luzon
V Amphib Corps Maui
2 Marine Division Saipan
3 Marine Division Guam
5 Marine Division Hawaii
Eighth Army
503 Parachute RCT Panay
93 Infantry Division Morotai
96 Infantry Division Mindoro
X Corps Macajalar Bay, Mindanao
24 Infantry Division Davao, Mindanao
31 Infantry Division Valencia, Mindanao
XIV Corps Canlubang, Luzon
6 Infantry Division Bagabag, Luzon
32 Infantry Division Anabat, Luzon
37 Infantry Division San Jose, Luzon
38 Infantry Division Manila, Luzon
Tenth Army Okinawa
24 Infantry Regiment Okinawa
147 Infantry Regiment Iwo Jima/Tinian
7 Infantry Division Okinawa
27 Infantry Division Okinawa
1 Marine Division Okinawa
XXIV Corps Okinawa
US Army Middle Pacific Hawaii
98 Infantry Division Fort Hase, Hawaii
Central Pacific Base Command
296 Infantry Regiment Kahuku Army Air Base, Hawaii
102 Infantry Regiment Schofield Barracks, Hawaii
372 Infantry Regiment Schofield Barracks, Hawaii
1/298 Infantry Battalion Schofield Barracks, Hawaii
Fleet Marine Force
III Amphib Corps Guam
4 Marine Division Maui
6 Marine Division Guam
Higher Headquarters
Armies
Three U.S. Armies served in the Pacific; the Sixth commanded by General Kruger, the Eighth commanded by Lieutenant General Eichelberger, and the Tenth commanded by General Stillwell. By August 1945 First Army commanded by General Hodges had an advanced headquarters in the Philippines. There is some indication that the Fourth Army commanded by Lieutenant General Patch would have been sent to the Pacific as well. Sixth Army would lead the assault on Kyushu. First and Eighth Armies would assault Honshu. Note that Patch died in November 1945 and Stillwell in October of 1946, both of natural causes.
Corps HQ
Six Army Corps, (I, IX, X, XI, XIV, XXIV) served in the Pacific. Their leaders were MG Swift, MG Ryder, MG Sibert, LG Hall, LG Griswold, and LG Hodge. In addition there were two Marine Amphibious Corps (III, V) commanded by MG Rockey and MG Schmidt. Six additional Army Corps headquarters were moving toward the Pacific in August 1945 as follows (Dates and locations based primarily on Shelby Stanton):
Corps Commander Arrive USA Aug 45 Location
XVIII Corps MG Ridgeway Jun-45 Camp Campbell, KY
III Corps MG Van Fleet 6-Jul-45 Camp Polk, LA
VII Corps LG Collins 9-Jul-45 Camp San Luis Obispo, CA
XIII Corps MG Gillem 9-Jul-45 Camp Cook, CA
V Corps MG Hubner 11-Jul-45 Fort Jackson, SC
VIII Corps LG Middleton 31-Jul-45 Camp Bowie, TX
XIII Corps with two armored divisions, deployed directly from the USA, was included in the CORONET assault force. III, V, VII, and XVIII Corps are typically understood to be B, C, D, and E Corps in Pacific planning documents. VIII Corps was likely F Corps, which was planned to relieve the Marines on Kyushu in March 1946.
Divisions
In August 1945, eighteen divisions were scheduled to be sent to the Pacific, seventeen US and one Canadian, as follows:
Division Arrive USA Aug 45 Location Planned in WestPac
86 Infantry Division 17 Jun 1945 Camp Gruber, OK Nov-45
97 Infantry Division 26 Jun 1945 Fort Bragg, NC Nov-45
These two divisions were rushed to the Pacific, arriving 7 Sep 45 and 14 Sep 1945 respectively.
95 Infantry Division 29-Jun-45 Camp Shelby, MS Nov-45
104 Infantry Division 3-Jul-45 Camp Luis Obispo, CA Nov-45
4 Infantry Division 10-Jul-45 Camp Butner, NC Dec-45
8 Infantry Division 10-Jul-45 Fort Leonard Wood, MO Dec-45
87 Infantry Division 11-Jul-45 Fort Benning, GA Dec-45
5 Infantry Division 19-Jul-45 Camp Campbell, KY Dec-45
44 Infantry Division 20-Jul-45 Camp Chaffee, AR Dec-45
2 Infantry Division 20-Jul-45 Camp Swift, TX Dec-45
28 Infantry Division 2-Aug-45 Camp Shelby, MS Jan-46
30 Infantry Division 21-Aug-45 Fort Jackson, SC Jan-46
35 Infantry Division 10-Sep-45 Camp Breckenridge, KY Feb-46
91 Infantry Division 10-Sep-45 Camp Rucker, AL Feb-46
45 Infantry Division 10-Sep-45 Camp Bowie, TX Feb-46
6 Canadian Division Vancouver Is., BC Mar-46
13 Armored Division 23-Jul-45 Camp Cook, CA Mar-46, Sent directly to the CORONET assault.
20 Armored Division 6 Aug 1945 Camp Cook, CA Mar-46, Sent directly to the CORONET assault.
The U.S. was planning to send four additional divisions per month to the Pacific to reinforce the war against of Japan.
Two additional divisions returned to the CONUS and were sent to US bases before mass inactivations started.
10 Mountain Division 11-Aug-45 Camp Carson, CO
13 Airborne Division 23-Aug-45 Fort Bragg, NC
At the end of the war, the Commonwealth nations, Britain, Canada, Australia, and New Zealand we working toward including a Commonwealth Corps in the assault on Honshu. This would have resulted in a revision of the then current plan for inclusion of the Canadian Division within a US Corps.
The Australian government was considering sending an Australian Imperial Force infantry division (10th). As with the Canadian division it was to made up from experienced volunteers from the other divisions of each the Armies. The British anticipated sending a Corps headquarters and the 3rd British Infantry Division. The plan was to send the division to the United States for training. At war’s end there was a disagreement between Australia and Brittan over the officer to command the corps.
The French had also offered two divisions for the invasion of Japan.
Cavalry Squadrons
Seven Cavalry Reconnaissance Squadrons were included in the troop list for CORONET. While none of these were present in the Pacific in August 1945, eleven squadrons were in the redeployment pipeline.
Four squadrons in Germany were planned to be deployed without a stop in the CONUS.
104 Cav Recon Squadron
16 Cav Recon Squadron
19 Cav Recon Squadron
107 Cav Recon Squadron
Seven squadrons were in the redeployment pipeline in the United States.
Division Arrive USA Aug 45 Location
43 Cav Recon Squadron 5-Jul-45 Camp Bowie, TX
18 Cav Recon Squadron 10-Jul-45 Camp Gruber, OK
32 Cav Recon Squadron 10-Jul-45 Camp Bowie, TX
3 Cav Recon Squadron 10-Jul-45 Fort Bragg, NC
101 Cav Recon Squadron 11-Jul-45 Camp Campbell, KY
44 Cav Recon Squadron 2-Aug-45 Fort Bragg, NC
116 Cav Recon Squadron 16-Aug-45 Camp Campbell, KY
Armored Group Headquarters
Each of the Armies in the Pacific had an associated Armored Group Headquarters. 13th Armored Group was assigned to Sixth Army and scheduled for OLYMPIC. 4th Armored Group was on Leyte with the Eighth Army and 20th Armored Group was on Okinawa with Tenth Army. An Armored Group for the First Army was in the redeployment pipeline:
12th Armored Group 1-Jul-45 Camp Gruber, OK