Tet.

The year 1968 was a big turning point in the Vietnam War, because L.B.Johnson had increased its commitment to S.Vietnam. In February 1968, the Vietcong launched the Tet Offensive against S.Vietnam and US; also, it caused US withdrawal indirectly. What made the Tet Offensive so important?
Politically, at the begging of the war, the US government thought that they would absolutely win in the Vietnam War because America was a world superpower all the time, also they have more powerful weapons and more supply. Achievement also gave them a confidence. The US always had won the War, for example…