2nd Battalion, 39th Infantry Regiment, 9th Infantry Division
https://en.wikipedia.org/wiki/39th_Infantry_Regiment_(United_States)
"After a series of inactivations and activations spanning a 20-year period, the 2nd Battalion, 39th Infantry Regiment was reactivated on 1 February 1966 as part of the 9th Infantry Division at Fort Riley, Kansas. The 39th deployed in 1966 with the 9th Infantry Division to the Republic of Vietnam. The regiment participated in operation Palm Tree, the 1968 Tet Offensive, and the battle of the Plain of Reeds. When the 2nd Battalion returned to Hawaii and deactivated in September, 1969, its battle streamers now included Counteroffensive Phase II, Counteroffensive Phase III, TET Counteroffensive, Counteroffensive Phase IV, Counteroffensive Phase V, Counteroffensive Phase VI, TET 69 Counteroffensive, and Summer-Fall 1969. The battalion had also received three Republic of Vietnam Crosses of Gallantry with Palm, the Republic of Vietnam Civil Action Medal, First Class, two Valorous Unit Awards and its fourth Presidential Unit Citation."
"After a series of inactivations and activations spanning a 20-year period, the 2nd Battalion, 39th Infantry Regiment was reactivated on 1 February 1966 as part of the 9th Infantry Division at Fort Riley, Kansas. The 39th deployed in 1966 with the 9th Infantry Division to the Republic of Vietnam. The regiment participated in operation Palm Tree, the 1968 Tet Offensive, and the battle of the Plain of Reeds. When the 2nd Battalion returned to Hawaii and deactivated in September, 1969, its battle streamers now included Counteroffensive Phase II, Counteroffensive Phase III, TET Counteroffensive, Counteroffensive Phase IV, Counteroffensive Phase V, Counteroffensive Phase VI, TET 69 Counteroffensive, and Summer-Fall 1969. The battalion had also received three Republic of Vietnam Crosses of Gallantry with Palm, the Republic of Vietnam Civil Action Medal, First Class, two Valorous Unit Awards and its fourth Presidential Unit Citation."