As agreed at the Yalta Conference , the Soviet Union went to war against Japan three months after the defeat of Germany . The Soviet forces invaded Manchuria . This was the end of the Manchukuo puppet state and all Japanese settlers were forced to leave China . The Soviet Union dismantled the industrial base in Manchuria built up by the Japanese in the preceding years . Manchuria also became a base for the Communist Chinese forces because of the Soviet presence
Yalta Conference
Yalta Conference
Aftermath of World War II