The French tried to regain control. They used the emperor Bao Dai as their puppet in this endeavour. The Vietminh were forced to retreat to the hills. After eight years of fighting, the Vietminh were able to defeat the French in 1954 at Dien Bien Phu. And a peace negotiation took place in Geneva after the French defeat. Vietnam was divided into two parts viz. south and north Vietnam. Ho Chi Minh and the communists assumed power in the north. Bao Dai’s regime took control of the south.