nov 2, 1955 - Vietnam War
The communist government of North Vietnam against South Vietnam, fighting for democracy. Many believed isolationism was the best option for the U.S. because "I do not consider this our war and I feel that all of Vietnam is not worth the life of a single American Boy" But as it turned out we could not handle a communist takeover and got involved to prevent communism from reaching S. Vietnam.
Added to timeline:
Voices of Isolationism Timeline