What were the approximate dates for the beginning and the end of the Vietnam war?

The Vietnam War is generally considered to have begun on November 1, 1955, when the U.S. established the Military Assistance Advisory Group to aid South Vietnam. The conflict escalated throughout the 1960s, culminating with the withdrawal of U.S. troops, which is often marked by the fall of Saigon on April 30, 1975, signaling the end of the war.