Ranar 8 ga Agusta, 1945, watanni uku bayan da Nazi Jamus ta mika wuya, kuma a makon da Amurka ta jefa bama-bamai a Hiroshima da Nagasaki, Soviet Union ta kaddamar da mamaye Manchuria
, wani babban aikin soja da ke tattare da sojoji miliyan 1.5 a kan sojojin Kwantung miliyan daya, ragowar sojojin Japan da suka rage. Sojojin Soviet sun sami nasara mai nasara yayin da Kwantung ya sha wahala sosai, tare da mutane 700,000 sun mika wuya. Tarayyar Soviet ta rarraba wasu makamai na Kwantung Army da aka kama zuwa CCP, waɗanda har yanzu suna yaƙi da KMT a cikin Yaƙin Basasa na China.