On August 8, the Soviet Union declared war on Japan and attacked the Japanese occupied Manchuria. After Japan agreed to surrender on August 14, 1945, American troops began to enter Japan. Japan officially surrendered to the United States, Great Britain, and the Soviet Union on September 2, 1945.
The two nuclear bombs dropped on both Japanese cities forced the military cabinet and government to accept unconditional surrender to the Allies. On September 2, 1945 the Unconditional Surrender was signed by major Japanese officials ending the hostilities between Japan and the Allied forces. It was previously announced by Emperor Hirohito on August 15, 1945 on Jewel Voice Broadcast of the surrender of Japan. As quoted in his speech, "The war situation has developed not necessarily to Japan's advantage." He also brings up the Nuclear bombs that were used among the cities of Nagasaki and Hiroshima, "Moreover, the enemy has begun to employ a new and most cruel bomb, the power of which to do damage is, indeed, incalculable, taking the toll of many innocent lives." Therefore it brought Japan into a fold after the US dropped two nuclear bombs on Japan.
