The Tet Offensive was a country-wide offensive launched by the North Vietnamese Army and Viet Cong allies in South Vietnam in January 1968.
The goal of the offensive was to break the will of the South Vietnamese military and stimulate a popular uprising against the pro-American South Vietnamese government. The US Army Special Forces, including the Green Berets from the 5th Special Forces Group, played a significant role in the conflict by demonstrating exceptional valor during the five-week period leading up to and during the Tet Offensive. Although the number of conventional troops in Vietnam increased during this period, Special Forces continued to play an important role. Individual members of the Special Forces, such as Sgt. Gordon D. Yntema, Staff Sgt. Drew D. Dix, Sgt. 1st Class Eugene Ashley Jr., and Staff Sgt. Fred W. Zabitosky, showed bravery and heroism in various battles throughout the Tet Offensive. Their actions were critical in securing victory for the US and South Vietnamese forces in some of the most intense battles of the conflict.
Source:https://soldiersystems.net/2023/02/08/indomitable-valor-special-forces-heroism-during-tet-offensive/