Why did American’s view of the war in Vietnam change in 1968?

The Tet Offensive of 1968 proved to be the turning point of the Vietnam War and its effects were far-reaching. ... Given this situation, Johnson launched what became known as the “success offensive,” designed to convince the American people that the war was being won and that administration policies were succeeding.

macon. i believe thats the answer

sorry if im wrong.

1.   île de la cité

2. 200 years

3. for the nave and choir

hope im right, havent learned about this in a year