Note: This date includes all moments of American involvement, and the war after American involvement, which is why it is so long
Ground troops are not sent until after the Gulf of Tonkin Incident
All US ground troops withdrawn after 1973
French defeat in Indochina at Diem Bien Phu lead to Geneva Conference in 1954 in which it ended hostilities between the French and Vietnamese and temporarily divided Vietnam at the 17th parallel, and called for an election in 1956. This led to the US being involved because they did not want the elections. This steadily escalated from Eisenhower and JFK to full out ground troops under Johnson.
Vietnam became communist as the north took power
America now reluctant to use military power, the public was divided and Americans do not trust the government. Also, 60k Americans were killed in the war
Containment failed as Cambodia falls to communists