Orders of battle for Downfall

The units slated to participate in Operation Downfall&mdash;the Allied invasions of Japan&mdash;as of about August 1945.

Allied

 * United States
 * U.S. Sixth Army (Gen. Walter Krueger)
 * Yakushima and Koshikijima Islands — 40th Infantry Division (Brig. Gen. Donald Myers) (22,000 men)
 * Tanegashima — 158th Infantry Regiment (Brig. Gen. Hanford MacNider) (7,600 men)
 * Miyazaki — U.S. I Corps (Maj. Gen. Innis P. Swift) (95,000 men):
 * 25th Infantry Division, 33d Infantry Division, 41st Infantry Division
 * Ariake — U.S. XI Corps (Maj. Gen. Charles P. Hall) (113,000 men):
 * 1st Cavalry Division, 43d Infantry Division, Americal Division, 112th Cavalry Regiment
 * Kushikino — U.S. V Amphib Corps (Maj. Gen. Harry Schmidt) (99,000 men):
 * 2nd Marine Div., 3d Marine Division, 5th Marine Division
 * 6th Army reserves — U.S. IX Corps (Maj. Gen. Charles W. Ryder) (79,000 men):
 * 77th Infantry Division, 81st Infantry Division, 98th Infantry Division;
 * 11th Airborne Division (Maj. Gen. Joseph M. Swing) (15,000 men)


 * U.S. Third Fleet (Adm. William F. Halsey):
 * 20 CV and CVL;
 * 9 BB;
 * 26 CB, CA, CL, CLAA;
 * 75 DD


 * U.S. Fifth Fleet (Adm. Raymond A. Spruance):
 * 36 CVE;
 * 11 BB;
 * 26 CA and CL;
 * 387 DD and DE;
 * 394 AKA, AP, APA, APD, APH;
 * 977 LSD, LSM, LST, and LSV


 * U.S. Seventh Fleet (Adm. Thomas C. Kinkaid):


 * Far East Air Forces (Gen. George C. Kenney) (119,000 men):
 * Fifth, Seventh, Thirteenth Air Force
 * 14 bomber groups, 10 fighter groups


 * U.S. Army Strategic Air Forces (Gen. Carl A. Spaatz, Maj. Gen. Curtis LeMay)
 * Twentieth Air Force (Lt. Gen. Nathan Twining) (77,000 men)
 * 1,000 B-29 Superfortresses
 * Eighth Air Force (Lt. Gen. Jimmy Doolittle)


 * British Commonwealth
 * British Pacific Fleet (operating as part of Third Fleet):
 * 6 fleet and light fleet carriers
 * Tiger Force (detached from RAF Bomber Command):
 * 480–580 Avro Lancaster bombers (about half to be used as tankers for in-flight refuelling)
 * Australian First Tactical Air Force
 * 20 fighter/attack squadrons from the Royal Australian Air Force

Japan

 * 16th Area Army[~US Army] (Lt. Gen. Yokoyama Isamu) (600,000 men)
 * Northern Kyūshū&mdash;56th Army [~US Corps]:
 * 145th Div., 312th Div., 351st Div., 124th IM Brig.;
 * 57th Div. (20,000 men), 4th Tank Brig.
 * Southeastern Kyūshū&mdash;57th Army (Lt. Gen. Nishihara Kanji) (150,000 men):
 * Tanegashima&mdash;109th IM Brig. (5,900 men)
 * Miyazaki&mdash;154th Div., 156th Div.; 212th Div. (55,000 men)
 * Ariake&mdash;86th Div., 98th IM Brig., 1 reg., 3 inf. bat. (29,000 men)
 * 25th Div., 5th Tank Brig., 6th Tank Brig.
 * Southwestern Kyūshū&mdash;40th Army (Lt. Gen. Nakazawa Mitsuo) (85,000 men):
 * 303rd Div. (12,000 men) (Sendai); 206th Div. (Fukiage); 146th Div., 125th IM Brig. (S. Satsuma Peninsula); 77th Div., 1 tank reg.
 * 216th Div., 4 brig.


 * 5,000 aircraft assigned as kamikazes, 5,000 aircraft available for kamikaze service, 7,000 aircraft in need of repair


 * 100 Koryu-class midget submarines, 250 Kairyu-class midget submarines, 1,000 Kaiten manned torpedoes, 800 Shinyo suicide boats

Allied

 * United States
 * U.S. First Army (Gen. Courtney H. Hodges):
 * U.S. III Amphibious Corps:
 * 1st Marine Div., 4th Marine Div., 6th Marine Div.
 * U.S. XXIV Corps:
 * 7th Inf. Div., 27th Inf. Div., 96th Inf. Div.,
 * Follow-on corps:
 * 5th Inf. Div., 44th Inf. Div., 86th Inf. Div.


 * U.S. Eighth Army (Lt. Gen. Robert L. Eichelberger):
 * U.S. X Corps:
 * 24th Inf. Div., 31st Inf. Div., 37th Inf. Div.
 * U.S. XIII Corps:
 * 13th Arm. Div., 20th Arm. Div.
 * U.S. XIV Corps:
 * 6th Inf. Div., 32nd Inf. Div., 38th Inf. Div.
 * Follow-on corps:
 * 4th Inf. Div., 8th Inf. Div., 87th Inf. Div.


 * Army Forces Pacific Reserve:
 * 97th Inf. Div.
 * Follow-on corps:
 * 2nd Inf. Div., 28th Inf. Div., 35th Inf. Div.
 * Follow-on corps:
 * 91st Inf. Div., 95th Inf. Div., 104th Inf. Div.
 * 11th Abn. Div.,


 * British Commonwealth
 * Commonwealth Corps, (Lt. Gen. Charles Keightley):
 * UK 3rd Inf. Div., 6th Canadian Inf. Div., Australian 10th Div.

Japan

 * 12 divisions (560,000 men) (as of August 1945)