The Allied forces land at Okinawa 1945
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Okinawa was the largest amphibious invasion of the Pacific campaign and the last major campaign of the Pacific War. More ships were used, more troops put ashore, more supplies transported, more bombs dropped, more naval guns fired against shore targets than any other operation in the Pacific. More people died during the Battle of Okinawa than all those killed during the atomic bombings of Hiroshima and Nagasaki. Casualties totaled more than 38,000 Americans wounded and 12,000 killed or missing, more than 107,000 Japanese and Okinawan conscripts killed, and perhaps 100,000 Okinawan civilians who perished in the battle. |
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The battle of Okinawa proved to be the bloodiest battle of the Pacific War. Thirty-four allied ships and craft of all types had been sunk, mostly by kamikazes, and 368 ships and craft damaged. The fleet had lost 763 aircraft. Total American casualties in the operation numbered over 12,000 killed [including nearly 5,000 Navy dead and almost 8,000 Marine and Army dead] and 36,000 wounded. Navy casualties were tremendous, with a ratio of one killed for one wounded as compared to a one to five ratio for the Marine Corps. Combat stress also caused large numbers of psychiatric casualties, a terrible hemorrhage of front-line strength. |
 
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There were more than 26,000 non-battle casualties. In the battle of Okinawa, the rate of combat losses due to battle stress, expressed as a percentage of those caused by combat wounds, was 48% [in the Korean War the overall rate was about 20-25%, and in the Yom Kippur War it was about 30%]. American losses at Okinawa were so heavy as to illicite Congressional calls for an investigation into the conduct of the military commanders. Not surprisingly, the cost of this battle, in terms of lives, time, and material, weighed heavily in the decision to use the atomic bomb against Japan just six weeks later. |
 
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Japanese human losses were enormous: 107,539 soldiers killed and 23,764 sealed in caves or buried by the Japanese themselves; 10,755 captured or surrendered. The Japanese lost 7,830 aircraft and 16 combat ships. Since many Okinawan residents fled to caves where they subsequently were entombed the precise number of civilian casualties will probably never be known, but the lowest estimate is 42,000 killed. |
 
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Somewhere between one-tenth and one-fourth of the civilian population perished, though by some estimates the battle of Okinawa killed almost a third of the civilian population. According to US Army records during the planning phase of the operation, the assumption was that Okinawa was home to about 300,000 civilians. At the conclusion of hostilities around 196,000 civilians remained. However, US Army figures for the 82 day campaign showed a total figure of 142,058 civilian casualties, including those killed by artillery fire, air attacks and those who were pressed into service by the Japanese army. |
 
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American losses mounted as soldiers and marines assaulted points on the Shuri line with the deceptive names of Sugar Loaf, Chocolate Drop, Conical Hill, Strawberry Hill, and Sugar Hill. During the course of the battle American forces were informed of two pieces of dramatic news, one tragic and the other joyous. The first was the death of president Franklin Roosevelt on 12 April and the latter the surrender of Nazi Germany on 8 May. |
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Heavy pressure on the Shuri Line finally convinced GEN Ushijima to withdraw southward to his final defensive positions on the Kiyamu Peninsula. His troops began moving out on the night of 23 May but were careful to leave behind rear guard elements that continued to slow the American advance. Japanese soldiers too wounded to travel were given lethal injections of morphine or simply left behind to die. By the first week of June, US forces had captured only 465 enemy troops while claiming 62,548 killed. |
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It would take 2 more weeks of hard fighting and an additional 2 weeks of "mopping up " operations pitting explosives and flamethrowers against determined pockets of resistance before the battle would finally be over.The so called "mopping up" fighting between 23 and 29 June netted an additional 9,000 enemy dead and 3,800 captured. Among the Japanese, the incidence of suicide soared during the final days. An examination of enemy dead revealed that, rather than surrender, many had held grenades against their stomachs, ending their personal war in that manner. General Ushijima committed ritual suicide (hara-kiri) on 16 June, convinced that he done his duty in service to the Emperor. |
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The document ending the Battle of Okinawa was signed on what is now Kadena Air Base on 07 September 1945. Long before the firing stopped on Okinawa, engineers and construction battalions, following close on the heels of the combat forces, were transforming the island into a major base for the projected invasion of the Japanese home islands. Reference |