US involvement in the Vietnam War peaked in 1968, with the largest number of American troops, 549,550, fighting in the country and the most casualties in a single year. On Jan. 1, the Vietcong attacked a US base, ending a previous truce, and at the end of the month they launched the Tet Offensive. On their TVs, Americans saw shocking images from the war, and soon public opinion began to turn against the effort. Student protests also picked up, and in April, Columbia University in NYC shut down for a week.
Vietnam Ramps Up
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