what set the stage for the Vietnam and Korean war was the nuclear war. two bombs were sent during these wars to japan in 1945
Japan had control over the Vietnam after the bombing the Vietnam people made their own personal government and they moved on. after japan lost in ww2 they left Vietnam and the nthe french had control
So there for japan ave up and just gave the land to the french
world war 2 hold start the Koran war by splitting the north and the south Korea. then world war 2 came to an end and the soviet union helped fight against japan