Soviet–Japanese War
The Soviet–Japanese War (; ), known in Mongolia as the Liberation War of 1945 () was a military conflict within the Second World War beginning soon after midnight on 9 August 1945, with the Soviet invasion of the Japanese puppet state of Manchukuo. The Soviets and Mongolians ended Japanese control of Manchukuo, Mengjiang (Inner Mongolia), northern Korea, Karafuto, and the Chishima Islands (Kuril Islands). The defeat of Japan's Kwantung Army helped bring about the Japanese surrender and the termination of World War II. The Soviet entry into the war was a significant factor in the Japanese government's decision to surrender unconditionally, as it made apparent that the Soviet Union was not willing to act as a third party in negotiating an end to hostilities on conditional terms.