Questions about the atomic bombs dropped by the United States in Hiroshima, Japan and other areas

At that time, the United States won midway and Guadalcanal successively, and then won the battles of Saipan and Iwo Jima at great cost. At this time, the U.S. High Command considered that B-29 heavy bombers were used to bomb important Japanese cities, and then the U.S. military forcibly landed on the island of Japan for occupation, but it turned out that this method was not feasible. Because the Japanese army is educated by the spirit of Bushido, all Japanese soldiers will not surrender, but will only fight with the American army to the end, so that the American army will certainly win the battle, but the casualties will be very huge. Unlike European soldiers, Japanese soldiers surrender when they can't beat them.

At that time, American physicist Oppenheimer led American volunteers to invent the atomic bomb. At the same time, Truman, who took over as President of the United States, thought twice that too many American soldiers should not be sacrificed. At the same time, in order to avenge the 3, soldiers killed by the Japanese attack on Pearl Harbor in the United States, he decided to bomb the main cities in Japan. At first, he thought it was Tokyo and Ogura Arsenal, but the former was worthless because it was bombed, and the latter chose Hiroshima and Nagasaki because the weather was not good at that time. This is for the early end of the war and to avoid unnecessary casualties.