The country was meant to be ruled by Bao Dai who was supported by the west. Ho Chi Minh was supported by the Russians, Chinese and Eastern Europe - all communist.
In November 1953, the French sent men from their crack Parachute Regiment to Vietnam. It was naturally assumed by the French that this unit would defeat the untrained Viet Minh guerrillas. They were sent to Dien Bien Phu in the north. In May 1954, the regiment was attacked by the North Vietnamese and surrendered, which came as a terrible blow to the French people. The French pulled out of Vietnam in the same month.