During the Soviet invasion of Manchuria, as the 1st Red Banner Army invested Mutanchiang, the Soviet 5th Army to the south continued its advance westward, enveloping and destroying the Japanese 278th Infantry Regiment, the survivors of which mounted a last-ditch banzai charge rather than surrender. By the end of the day, all of Mutanchiang had fallen into Soviet hands, and the battle for the city was over. Shortly afterward, the main strength of the Kwantung Army laid down its arms in surrender as per the Emperor's broadcast. The Battle of Mutanchiang, and World War II, had come to an end.