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"The use of the atomic bomb would have to be done with visual targeting, not by use of radar. [...] The targets should be 'large urban areas of not less than 3 miles in diameter existing in the larger populated areas… between the Japanese cities of Tokyo and Nagasaki… [and] should have high strategic value.' A list of possible targets that met this criteria was given [...] Of these, Hiroshima was noted as 'the largest untouched target not on the 21st Bomber Command priority list.' Tokyo, on the other hand, was 'now practically all bombed and burned out and is practically rubble with only the palace grounds left standing.' It was further noted that they had to take into account that the policy of the 20th Air Force was now 'systematically bombing out' cities 'with the prime purpose in mind of not leaving one stone lying on the other,' and that they would not likely reserve targets just for the Manhattan Project." "Stimson left the meeting thinking Truman completely understood the matter, and the final target order — with Hiroshima, Kokura, Niigata, and Nagasaki (the latter added only then) — was sent out. But what did Truman take away from this meeting? We can look at Truman’s own diary entry from July 25th: "
This weapon is to be used against Japan between now and August 10th. I have told the Sec. of War, Mr. Stimson, to use it so that military objectives and soldiers and sailors are the target and not women and children. Even if the Japs are savages, ruthless, merciless and fanatic, we as the leader of the world for the common welfare cannot drop that terrible bomb on the old capital or the new. He and I are in accord. The target will be a purely military one and we will issue a warning statement asking the Japs to surrender and save lives. I’m sure they will not do that, but we will have given them the chance. It is certainly a good thing for the world that Hitler’s crowd or Stalin’s did not discover this atomic bomb. It seems to be the most terrible thing ever discovered, but it can be made the most useful.
" This passage reflects an incredible misconception. Truman appears, here, to believe that Hiroshima was 'a purely military' target, and that 'soldiers and sailors' would be killed, 'not women and children.' But of course every city on that list was inhabited primarily by civilians. And by the calculus of war being waged, every city on that list had a military connection — they produced weapons for the military." http://blog.nuclearsecrecy.com/2014/08/08/kyoto-misconceptio... |
Japan was beaten. They had already offered a complete surrender, conditional only on keeping the emperor, which was rejected by the U.S. Their utter defeat and the hopeless state of their armed forces was well-known by the allies, since their communication encryption had been cracked months earlier.
The real issue was likely that the Soviet Union, positioned to become a formidable power in the post-war theater, had promised to enter the war against Japan on August 6. The Americans needed to make sure that Japan had been defeated by that point and that the U.S. would occupy Japan, not Soviet Russia. Hence the rush to drop the bombs before that.
Also, there was no uncertainty about the lack of military significance of Hiroshima and Nagasaki, the contemporary reports state this clearly, they even warn about the presence of American POWs in the area (which was ignored and they were incinerated along with the hundreds of thousands of Japanese civilians).