What was the significance of the Tet Offensive for the Vietnam War?

By 1968 the USA had increased its commitment to South Vietnam in the hope of preventing the spread of communism. There were 535,000 US troops in Vietnam by that time which was more than ever. They saved South Vietnamese government but over 15,000 Americans had died in the conflict. The National Liberation Front and Vietcong launched the Tet Offensive in Feb. 1968 against the South and America. Tet, the Vietnamese New Year, was chosen to launch a surprise attack. …

…had reached agreement with North Vietnamese delegation at Paris Peace Talks. He was able to announce the North Vietnamese were willing to agree to a ceasefire. Under this ceasefire the forces of North and South Vietnam would retain the areas under their control when the fighting stopped. In 1975 the communists launched a Spring Offensive against South Vietnam in March 1975, South Vietnamese army fled in panic and a month later Saigon was captured my the communists.