Anti-war movement

Anti-war movement, opposition to U.S. involvement in the Vietnam war. From a relatively small group of protesters during the Kennedy administration, the movement proliferated and gained a broad base, its popularity widely believed responsible for President Lyndon B. Johnson's decision not to run for a second term in 1968. Hundreds of thousands demonstrated their opposition in protest marches in 1968–69. Anti-war pressure intensified under President Richard M. Nixon and strongly influenced his decision to settle for peace without victory.