near the end of ww2 soviets invaded and occupied manchuria by destroying the jap occupiers. it led to jap unconditional surrender to americans not soviets as jap emperor would be better off under american occupation. otherwise the jap emperor would give up jap islands and continue the war in manchuria. it was americans who negotiated with soviets to return manchuria to kmt china. otherwise it would be part of russia today. soviets left much of their military hardware after manchurian invasion to the ccp to fight the kmt. ccp should thank americans for getting manchuria back in chinese hands. but of course we all know ccp is a bunch of backstabbing and ungrateful thugs.