Allied

• United States
  • U.S. Sixth Army (Gen. Walter Krueger
    Walter Krueger
    Walter Krueger was an American soldier of German descent and General in the first half of the 20th century. He is best known for his command of the Sixth United States Army in the South West Pacific Area during World War II...
    
    )
    • Yakushima
      Yakushima
      , one of the Ōsumi Islands, is an island of about 500 km² and roughly 15,000 islanders to the south of Kyūshū in Kagoshima Prefecture, Japan. The Vincennes Strait separates it from Tanegashima. The highest point on the island is Miyanoura-dake at 1,935 metres...
      
       and Koshikijima Islands
      Koshikijima Islands
      Koshikijima Islands in the East China Sea are an island chain that belongs to the city of Satsumasendai, Kagoshima, Japan. It is located 38 km west of the port city of Ichikikushikino, Kagoshima. Kagoshima Prefecture itself exists on the island of Kyūshū.- Major islands :* Kami-Koshikijima ,...
      
       — 40th Infantry Division (Brig. Gen. Donald Myers) (22,000 men)
    • Tanegashima
      Tanegashima
      is an island lying to the south of Kyushu, in southern Japan, and is part of Kagoshima Prefecture. The island is the second largest of the Ōsumi Islands....
      
       — 158th Infantry Regiment
      158th Infantry Regiment (United States)
      The 158th Infantry Regiment is a infantry unit of the Arizona National Guard. The regiment has served in World War I, World War II and Afghanistan.-History:...
      
        (Brig. Gen. Hanford MacNider
      Hanford MacNider
      Hanford “Jack” MacNider was a United States diplomat and United States Army General, serving in both World War I and World War II. He was a Scottish Rite Freemason.-Biography:...
      
      ) (7,600 men)
    • Miyazaki
      Miyazaki, Miyazaki
      is the capital city of Miyazaki Prefecture on the island of Kyūshū in Japan. Located on the coast and perforated by several rivers, Miyazaki City enjoys scenic views of both ocean and nearby, verdant mountains...
      
       — U.S. I Corps (Maj. Gen. Innis P. Swift
      Innis P. Swift
      Innis Palmer Swift was a Major General in the United States Army. He was the grandson and namesake of Civil War Major General Innis Newton Palmer, as well as the grandson of Brigadier General Ebenezer Swift...
      
      ) (95,000 men):
      • 25th Infantry Division, 33d Infantry Division, 41st Infantry Division
    • Ariake
      Ariake, Kagoshima
      was a town located in Soo District, Kagoshima, Japan.On January 1, 2006 Ariake was merged with the towns of Shibushi and Matsuyama, all from Soo District, to form the new city of Shibushi and no longer exists as an independent municipality....
      
       — U.S. XI Corps
      XI Corps (United States)
      XI Corps was a corps of the United States Army in World War II and the Korean War.-References:* Weigley, Russell F. . Eisenhower's Lieutenants. Bloomington: Indiana University Press. ISBN 0-253-13333-5....
      
       (Maj. Gen. Charles P. Hall
      Charles P. Hall
      Charles Philip Hall was an American General most notable for being the commander of the U.S. Army's XI Corps during World War II and the principal commander during the Battle of Bataan to liberate the Philippines from Japanese forces.-Early career and World War I:Hall was born in Sardis,...
      
      ) (113,000 men):
      • 1st Cavalry Division, 43d Infantry Division, Americal Division
        Americal Division
        The 23rd Infantry Division, more commonly known as the Americal Division of the United States Army was formed in May 1942 on the island of New Caledonia. In the immediate emergency following Pearl Harbor, the United States had hurriedly sent three individual regiments to defend New Caledonia...
        
        , 112th Cavalry Regiment
        112th Cavalry Regiment (United States)
        The 112th Cavalry Regiment was a Texas National Guard Regiment that served in several Pacific campaigns during World War II.-Early history:...
        
        
    • Kushikino
      Kushikino, Kagoshima
      was a city located in Kagoshima, Japan.On October 11, 2005 Kushikino was merged with the town of Ichiki, from Hioki District, to form the new city of Ichikikushikino....
      
       — U.S. V Amphib Corps
      V Amphibious Corps
      The V Amphibious Corps was a formation of the United States Marine Corps and was composed of the 3rd, 4th and 5th Marine Divisions during World War II. They were the amphibious landing force for the United States Fifth Fleet and were notably involved in the battles for Tarawa and Saipan in 1944...
      
       (Maj. Gen. Harry Schmidt
      Harry Schmidt (USMC)
      General Harry Schmidt served as Commanding General of the Fourth Marine Division during the Marshall Islands campaign and the Battle of Saipan, and as Commanding General of the Fifth Amphibious Corps during the battles of Tinian and Iwo Jima, during World War II...
      
      ) (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
      Joseph M. Swing
      Joseph May Swing was a Lieutenant General in the United States Army, who commanded the 11th Airborne Division during the campaign to liberate the Philippines in World War II.-Biography:...
      
      ) (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
    Raymond A. Spruance
    Raymond Ames Spruance was a United States Navy admiral in World War II.Spruance commanded US naval forces during two of the most significant naval battles in the Pacific theater, the Battle of Midway and the Battle of the Philippine Sea...
    
    ):
    • 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
    United States Seventh Fleet
    The Seventh Fleet is the United States Navy's permanent forward projection force based in Yokosuka, Japan, with units positioned near Japan and South Korea. It is a component fleet force under the United States Pacific Fleet. At present, it is the largest of the forward-deployed U.S. fleets, with...
    
     (Adm. Thomas C. Kinkaid
    Thomas C. Kinkaid
    Thomas Cassin Kinkaid was an admiral in the United States Navy during World War II. He built a reputation as a "fighting admiral" in the aircraft carrier battles of 1942 and commanded the Allied forces in the Aleutian Islands Campaign...
    
    ):

• • Far East Air Forces (Gen. George C. Kenney) (119,000 men):
    • Fifth
      Fifth Air Force
      The Fifth Air Force is a numbered air force of the United States Air Force Pacific Air Forces . It is headquartered at Yokota Air Base, Japan....
      
      , Seventh
      Seventh Air Force
      The Seventh Air Force is a numbered air force of the United States Air Force Pacific Air Forces . It is headquartered at Osan Air Base, Republic of Korea....
      
      , Thirteenth Air Force
      Thirteenth Air Force
      The Thirteenth Air Force is a numbered air force of the United States Air Force Pacific Air Forces . It is headquartered at Hickam Air Force Base on the island of Oahu, Hawaii. 13 AF has never been stationed in the continental United States...
      
      
      • 14 bomber groups, 10 fighter groups

• • U.S. Army Strategic Air Forces
    United States Strategic Air Forces in the Pacific
    The United States Strategic Air Forces in the Pacific was a World War II command and control authority of the strategic United States Army Air Forces in the Pacific Theater.-Overview:...
    
     (Gen. Carl A. Spaatz
    Carl Spaatz
    Carl Andrew "Tooey" Spaatz GBE was an American World War II general and the first Chief of Staff of the United States Air Force. He was of German descent.-Early life:...
    
    , Maj. Gen. Curtis LeMay
    Curtis LeMay
    Curtis Emerson LeMay was a general in the United States Air Force and the vice presidential running mate of American Independent Party candidate George Wallace in 1968....
    
    )
    • Twentieth Air Force
      Twentieth Air Force
      The Twentieth Air Force is a numbered air force of the United States Air Force Global Strike Command . It is headquartered at F.E. Warren Air Force Base, Wyoming.20 AF's primary mission is Intercontinental Ballistic Missile operations...
      
       (Lt. Gen. Nathan Twining
      Nathan Farragut Twining
      Nathan Farragut Twining, KBE was a United States Air Force General, born in Monroe, Wisconsin. He was Chief of Staff of the United States Air Force from 1953 until 1957...
      
      ) (77,000 men)
      • 1,000 B-29 Superfortress
        B-29 Superfortress
        The B-29 Superfortress is a four-engine propeller-driven heavy bomber designed by Boeing that was flown primarily by the United States Air Forces in late-World War II and through the Korean War. The B-29 was one of the largest aircraft to see service during World War II...
        
        es
    • Eighth Air Force
      Eighth Air Force
      The Eighth Air Force is a numbered air force of the United States Air Force Global Strike Command . It is headquartered at Barksdale Air Force Base, Louisiana....
      
       (Lt. Gen. Jimmy Doolittle
      Jimmy Doolittle
      General James Harold "Jimmy" Doolittle, USAF was an American aviation pioneer. Doolittle served as a brigadier general, major general and lieutenant general in the United States Army Air Forces during the Second World War...
      
      )

• British Commonwealth
  • British Pacific Fleet
    British Pacific Fleet
    The British Pacific Fleet was a British Commonwealth naval force which saw action against Japan during World War II. The fleet was composed of British Commonwealth naval vessels. The BPF formally came into being on 22 November 1944...
    
     (operating as part of Third Fleet):
    • 6 CV;
  • Tiger Force
    Tiger Force (air)
    Tiger Force, also known as the Very Long Range Bomber Force, was the name given to a World War II British Commonwealth long-range heavy bomber force, formed in 1945, from squadrons serving with RAF Bomber Command in Europe, for proposed use against targets in Japan...
    
     (detached from RAF Bomber Command
    RAF Bomber Command
    RAF Bomber Command controlled the RAF's bomber forces from 1936 to 1968. During World War II the command destroyed a significant proportion of Nazi Germany's industries and many German cities, and in the 1960s stood at the peak of its postwar military power with the V bombers and a supplemental...
    
    ):
    • 480–580 Avro Lancaster
      Avro Lancaster
      The Avro Lancaster is a British four-engined Second World War heavy bomber made initially by Avro for the Royal Air Force . It first saw active service in 1942, and together with the Handley Page Halifax it was one of the main heavy bombers of the RAF, the RCAF, and squadrons from other...
      
       bombers (about half to be used as tankers)
  • Australian First Tactical Air Force
    Australian First Tactical Air Force
    The Australian First Tactical Air Force was formed on 25 October 1944 by the Royal Australian Air Force . Its purpose was to provide a mobile force of fighter and ground attack aircraft that could support Allied army and naval units fighting the Empire of Japan in the South West Pacific Area...
    
    
    • 20 fighter/attack squadrons from the Royal Australian Air Force
      Royal Australian Air Force
      The Royal Australian Air Force is the air force branch of the Australian Defence Force. The RAAF was formed in March 1921. It continues the traditions of the Australian Flying Corps , which was formed on 22 October 1912. The RAAF has taken part in many of the 20th century's major conflicts...
      
      

Japan

• • 16th Area Army[~US Army] (Lt. Gen. Yokoyama Isamu) (600,000 men)
    • Northern Kyūshū—56th Army[~US Corps
      Corps
      A corps is either a large formation, or an administrative grouping of troops within an armed force with a common function such as Artillery or Signals representing an arm of service...
      
      ]:
      • 145th Div., 312th Div., 351st Div., 124th IM Brig.;
      • 57th Div. (20,000 men), 4th Tank Brig.
    • Southeastern Kyūshū—57th Army (Lt. Gen. Nishihara Kanji) (150,000 men):
      • Tanegashima—109th IM Brig. (5,900 men)
      • Miyazaki—154th Div., 156th Div.; 212th Div. (55,000 men)
      • Ariake—86th Div., 98th IM Brig., 1 reg., 3 inf. bat. (29,000 men)
      • 25th Div., 5th Tank Brig., 6th Tank Brig.
    • Southwestern Kyūshū—40th Army (Lt. Gen. Nakazawa Mitsuo) (85,000 men):
      • 303rd Div. (12,000 men) (Sendai); 206th Div. (Fukiage
        Fukiage, Kagoshima
        was a town located in Hioki District, Kagoshima, Japan.On May 1, 2005 Fukiage was merged with the towns of Higashiichiki, Hiyoshi and Ijūin, all from Hioki District, to form the new city of Hioki and no longer exists as an independent municipality....
        
        ); 146th Div., 125th IM Brig. (S. Satsuma
        Satsuma Province
        was an old province of Japan that is now the western half of Kagoshima Prefecture on the island of Kyūshū. Its abbreviation is Sasshū .During the Sengoku Period, Satsuma was a fief of the Shimazu daimyo, who ruled much of southern Kyūshū from their castle at Kagoshima city.In 1871, with the...
        
         Peninsula); 77th Div., 1 tank reg.
    • 216th Div., 4 brig.

• • 5,000 aircraft assigned as kamikaze
    Kamikaze
    The were suicide attacks by military aviators from the Empire of Japan against Allied naval vessels in the closing stages of the Pacific campaign of World War II, designed to destroy as many warships as possible....
    
    s, 5,000 aircraft available for kamikaze service, 7,000 aircraft in need of repair

• • 100 Koryu-class midget submarines, 250 Kairyu
    Kairyu class submarine
    The was a class of midget submarines of the Imperial Japanese Navy, designed in 1943–1944, and produced from the beginning of 1945. These submarines were meant to meet the invading American naval forces upon their anticipated approach of Tokyo.-History:...
    
    -class midget submarines, 1,000 Kaiten
    Kaiten
    The Kaiten were manned torpedos and suicide craft, they were used by the Imperial Japanese Navy in the final stages of World War II.-History:...
    
     manned torpedoes, 800 Shinyo suicide boats

Allied

• United States
  • U.S. First Army
    U.S. First Army
    The First United States Army is a field army of the United States Army. It now serves a mobilization, readiness and training command.- Establishment and World War I :...
    
     (Gen. Courtney H. Hodges):
    • U.S. III Amphibious Corps
      III Marine Expeditionary Force
      The III Marine Expeditionary Force is a Marine Air-Ground Task Force of the United States Marine Corps that is forward-deployed and able to deploy rapidly and conduct operations across the spectrum from humanitarian assistance and disaster relief to amphibious assault and high intensity combat. III...
      
      :
      • 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
    VIII Corps (United States)
    The U.S. VIII Corps was a corps of the United States Army that saw service during various times over a fifty-year period during the twentieth century. The VIII Corps was organized 26–29 November 1918 in the Regular Army in France and demobilized on 20 April 1919. The VIII Corps was soon...
    
     (Lt. Gen. Robert L. Eichelberger
    Robert L. Eichelberger
    Robert Lawrence Eichelberger was a general in the United States Army, who commanded the US Eighth Army in the South West Pacific Area during World War II. His Army was among the very first to engage the Japanese in the Pacific Theater of Operations.-Pre-World War II service:Eichelberger was born...
    
    ):
    • U.S. X Corps:
      • 24th Inf. Div., 31st Inf. Div., 37th Inf. Div.
    • U.S. XIII Corps
      U.S. XIII Corps
      Activated on 7 December 1942 in Providence, Rhode Island, the XIII Corps fought for 180 days in the European Theater of Operations, fighting from the Netherlands to the Elbe River. It was first activated under the command of then-Major General Emil F. Reinhardt, but would be commanded in combat by...
      
      :
      • 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.
        U.S. 87th Infantry Division
        The 87th Infantry Division was a unit of the United States Army in World War I and World War II.-World War I:*87th Division was a National Army division allocated to Arkansas, Louisiana and Mississippi....
        
        

• • 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
    Commonwealth Corps
    The Commonwealth Corps was the name given to a proposed British Commonwealth army formation, which was scheduled to take part in the planned Allied invasion of Japan in during 1945 and 1946. The corps was never formed however, as the Japanese surrender obviated any need for it...
    
    , (Lt. Gen. Charles Keightley
    Charles Keightley
    General Sir Charles Frederic Keightley, GCB, GBE, DSO was a senior officer in the British Army during and following World War II.-Military career:...
    
    ):
    • • UK 3rd Inf. Div.
        British 3rd Infantry Division
        The 3rd Mechanised Division, known at various times as the Iron Division, 3rd Division or as Iron Sides; is a regular army division of the British Army...
        
        , 6th Canadian Inf. Div.
        6th Canadian Infantry Division
        The 6th Canadian Infantry Division was a Canadian infantry division formed in 1942 during the Second World War. It was attached to Pacific Command. The division had a brigade sent to the Aleutian Islands Campaign, particularly at Kiska, but never saw action...
        
        , Australian 10th Div.
        Australian 10th Division
        The 10th Division was a division of the Australian Army, which served briefly during World War II. It was initially formed on 15 April 1942 from the Militia units of the Newcastle Covering Force, however, manpower shortages within the Army at that time led to it being disbanded in August that year...