The Vietnam War era refers specifically to the time period during which America was involved in military conflict with North Vietnam from approximately 1955 until 1975. It was a time of intense social and political change in the United States.
Related terms
Anti-War Movement: A social and political movement opposing U.S. involvement in the Vietnam War.
Draft: A system used to conscript young men into military service during times of war or national emergency.
Domino Theory: The belief that if one country fell under communist control, neighboring countries would also follow suit, like a row of dominos falling one after another.