First Indochina War
The French reoccupied Indochina after World War II after the territory had been part of the Empire of Japan. The Việt Minh launched a rebellion against the French authorities. The first few years of the war involved a low-level rural insurgency against the French. However, after the Chinese communists had reached the northern border of Vietnam in 1949, the conflict turned into a conventional war between two armies, which had modern weapons supplied by the United States and the Soviet Union.