As additional background, U.S. involvement in Vietnam started slowly with an initial deployment of advisors in the early 1950s, grew incrementally through the early 1960s and expanded with the deployment of full combat units in July 1965. The last U.S. personnel were evacuated from Vietnam in April 1975.

As additional background, U.S. involvement in Vietnam started slowly with an initial deployment of advisors in the early 1950s, grew incrementally through the early 1960s and expanded with the deployment of full combat units in July 1965. The last U.S. personnel were evacuated from Vietnam in April 1975.