5 September – On this day

Operation Jefferson Glenn was the last major operation in which U.S. ground forces participated in Vietnam.

This was a joint military operation combining forces of the US 101st Airborne and the 1st Infantry Division of the Army of the Republic of Vietnam (ARVN). The purpose of this operation was to shield critical installations in Huế and Da Nang by patrolling communist rocket belts along the edge of the mountains.

President Richard Nixon had begun his Vietnamization program in the summer of 1969; the objective was to increase the combat capability of the South Vietnamese forces so that they could assume responsibility for the war against the Viet Cong and the North Vietnamese forces as U.S. combat units were withdrawn and sent home.