The 13th Infantry Regiment ("First at Vicksburg") is a United States Army infantry regiment whose battalions are currently tasked as basic training battalions.
In August 1957 the regiment was reorganised under the Pentomic system as the 1st Battle Group, 13th Infantry Regiment and the old guidons (for A through M companies) were retired and new ones for the 1st Battle Group were issued. In January, 1958 the 1st Battle Group, 13th Infantry Regiment moved from Neu Ulm to Sandhofen. The First Battalion was posted to Baumholder whilst the Second Battalion was posted to Mannheim and remained there until 1 August 1984 when it was inactivated and relieved from assignment to the 8th Infantry Division.