The atomic bomb dropped by the United States is considered by Japan as the main reason for the defeat, but is this really the case? Winston Churchill, the British Prime Minister during World War II, wrote in his memoirs: "It is really a mistake to think that the fate of Japan is decided by the atomic bomb. Before the first atomic bomb was dropped, its failure was expected. That was caused by overwhelming sea power.

Only by relying on maritime power, we can seize the marine base used by Japan to launch its final attack and force its domestic troops to surrender automatically. Because its maritime transport has been destroyed. "As can be seen from this passage, in fact, there is no need to throw an atomic bomb. Japan has already lost. General douglas macarthur, who commanded the Pacific Allied Forces during World War II and served as Commander-in-Chief of the Allied Forces stationed in Japan after World War II, also publicly admitted in 1960 that "1945 the use of atomic bombs is not necessary militarily".

On July 26th, the United States, Britain and China issued the Potsdam Proclamation, urging Japan to surrender. On the morning of July 28th, all major Japanese newspapers reported the announcement. However, on July 30th, Prime Minister Kantas Suzuki said at a press conference: "I think the statement of the three countries reaffirmed the spirit of the Cairo Conference. The government felt that it was worthless, so it' silently killed'. We will continue this war. " Seeing that Japan's attitude is so tough, the United States decided to launch a nuclear strike against Japan.

In addition, there is the consideration of the post-war pattern. After modern historians and international relations scholars have evaluated and studied the situation at that time, many people think that the United States may have dropped the atomic bomb more to shock the Soviet Union. In order to prevent the Soviet Union from participating in the war and deter the Soviet Union. This view can be found in Churchill's memoirs: "The United States does not want the Soviet Union to participate in the war against Japan."

Indeed, before the successful atomic bomb experiment, both the United States and Britain strongly urged the Soviet Union to participate in the war, but after the successful atomic bomb experiment, the United States and Britain had no intention of letting the Soviet Union share the victory in the war against Japan. In fact, because Soviet troops occupied most of eastern Europe, Truman was eager to use the atomic bomb before the Soviet Union entered the war, instead of relying on the Soviet Union to end the Pacific War, so as to have the right to speak in solving the East Asian issue in the future.