The division was involved in the Tet Offensive of 1968, securing the massive Tan Son Nhut Air Base. In March, MG Keith L. Ware took command. That same month the division took part in Operation Quyet Thang ("Resolve to Win") and in April the division participated in the largest operation of the Vietnam War, Operation Toan Thang ("Certain Victory"). On 13 September, the division commander, MG Ware, was killed in action when his command helicopter was shot down by enemy anti-aircraft fire. MG Orwin C. Talbott moved up from his position of assistant division commander to assume command of the division.