Vietnam Conflict By amy_mahoney Period: Jan 1, 1960 to Jan 1, 1980 Vietnam Conflict Aug 1, 1964 Gulf of Tonkin Resolution Jan 31, 1968 Tet Offensive Attacks Begin Mar 16, 1968 My Lai Massacre May 1, 1970 Invasion of Cambodia May 4, 1970 Kent State Incident Jun 13, 1971 Pentagon Papers Published Mar 13, 1973 US Pullout of Vietnam