Executed by the North Vietnam Army and the Viet Kong in '68, the Viet Kong almost succeeded in taking the capital of S.V. and took over the US Embassy. This was captured live on TV and after all that Johnson had been promising, it had a huge impact on the American public. There was much doubt directed at the Johnson administration and the spark of the belief that perhaps it was time to just pull out of the war. This was a turning point. It represented a loss of American morale and the flame of larger anti-war protests. Veterans marched against the war. In 1968 US counter culture spread globally and there were protests around the world

That was called the Tet Offensive as it was launched during the Vietnames holy day of Tet.

No , the Tet Offensive was during the Vietnam War .

The TET offensive commenced on 31 Jan 1968.

Tet Offensive