 It was reassigned to the 25th Division on 1 February 1963 and reorganized and redesignated as the 1st Battalion, 5th Infantry on 12 August.It was sent to Vietnam in January 1966 and it was one of the few mechanized units to serve in that war.The 1st Battalion, 5th Infantry won a Valorous Unit Award as part of the 2nd Brigade Task Force, 25th Infantry Division, which