In about 1940.
France colonized the whole of Vietnam in 1855 after the Sino-French War.
Nineteen fifty nine
The Tonklin Bay incedent
November 1, 1955
Tonkin Gulf Incident
Begin with websites: Statistics about the Vietnam War & Vietnam War Time-Line
Historians normally "begin" the date in 1961.
Alright. The Vietnam War begin because the U.S. president, Eisenhower didn't want communism to spread throughout the world and eventually to America. The war ended because the north and south of Vietnam signed a treaty.