The Vietnam war started after the disagreements between the French, who had ruled Indochina before World War 2, and the communist Vietminh, founded and led by Ho Chi Minh. The communist Vietminh were determined to fight the French rule and make changes of their own.
After the Americans had made the Japanese surrender in August of 1945, Vietminh soldiers took over the capitol city, Hanoi, forced Emperor Bao Dai out of power and replaced him with Ho Chi Minh. On September 2nd they declared themselves independent and announced the creation of North Vietnam. The French recognized the new…