Answer :
The 1968 Tet Offensive was a major coordinated attack by North Vietnamese and Viet Cong forces on South Vietnam, seeking to achieve a decisive victory and spark an uprising, which marked a turning point in the Vietnam War.
The plan dubbed Tong Cong Kich-Tong Khoi Nghia, which is known as the 1968 Tet Offensive, was designed to launch a massive, simultaneous attack on major cities throughout South Vietnam, including the capital, Saigon. The North Vietnamese Communists and their Viet Cong allies aimed for a decisive victory that would turn the tide of the war in their favor, igniting an uprising among the South Vietnamese population against the US-backed South Vietnamese government. Though militarily not successful due to high casualties and the failure to incite a widespread popular uprising, the offensive was a psychological shock to the US public and government, and profoundly affected the US' perception and will to continue the conflict.