Following World War II the unit was inactivated at Fort Leonard Wood, Missouri on 18 November 1945. On 17 August 1949 the regiment was activated once again at Fort Jackson, South Carolina as part of the 8th Infantry Division where it remained until 1 August 1954. The 8th Infantry Division was transferred to Fort Carson, Colorado and the 13th went with it where it resumed its training mission. In 1955 the 8th ID was designated an Operation Gyroscope division and as part of the division the 13th completed its last training cycle in December, 1955. In January the regiment began to get permanent party personnel and new recruits,  Basic training for these recruits began in mid February and segued immediately into advanced training. Both training blocks were completed by mid June and the regiment achieved "combat ready" status. The regiment under the command of Ellis W. Williamson left Fort Carson for its new assignment in Germany where it replaced the 47th Infantry Regiment, 9th Infantry Division. Regimental headquarters and the 3rd Battalion were stationed at Wiley Barracks in Neu Ulm.