The 81st Armored Regiment (Medium) was activated on 1 October 1941 at Fort Knox, Kentucky, and assigned to the
5th Armored Division. It was subsequently redesignated as the 81st Armored Regiment on 1 January 1942 and moved to Camp Cooke, California on 16 February 1942 and to the California Maneuver Area on 14 August 1942. It returned to Camp Cooke on 19 November 1942 and moved to the Tennessee Maneuver Area on 24 March 1943. The 81st arrived at Pine Camp, New York, on 24 June 1943 where it was redesignated (less 3d Battalion, Maintenance Company, Service Company and Reconnaissance Company) as the 81st Tank Battalion on 20 September 1943. The 3d Battalion and Reconnaissance Company were redesignated at the 707th Tank Battalion (a unit of the
7th Armored Division) and Troop E, 85th Cavalry Reconnaissance Squadron, respectively. The remainder of the unit was disbanded. The 81st Tank Battalion left the
New York Port of Embarkation (NYPE) on 11 February 1944 and arrived in England on 23 February 1944, and then in France on 25 July 1944. Its August 1945 location was
Bleicherode, Germany. It returned to the US at the
Boston Port of Embarkation on 7 October 1945. The 81st earned the following campaign credits: • Normandy, 6 June 1944 – 24 July 1944 • Northern France, 25 July 1944 – 14 September 1944 • Rhineland, 15 September 1944 – 21 March 1945 • Central Europe, 22 March 1945 – 11 May 1945 • Ardennes-Alsace, 12 December 1944 – 25 January 1945
Source: U.S. Army Order of Battle: World War II by Shelby L. Stanton Combat Service Shortly after its service in California, the 81st Tank Battalion headed to Europe in July 1944 to participate in the battles for Normandy and Northern France. The unit was successful in liberating Luxembourg City on 10 September 1944. As December 1944 crept closer, the battalion entered the Huertgen Forest in the Alsace Region of France. The battalion then rested and refitted for the final push into Germany. The unit spearheaded the 5th Armored Division's drive to the Rhine River and became the first unit to cross the Siegfried Line into the Rhineland, crossing the Rhine in March 1945. It then drove to the Elbe, 45 miles from Berlin, and was engaged in mopping up German resistance in the Ninth Army sector. Post-World War II Upon returning from the battlefields of Europe, the battalion was inactivated in the fall of 1945. Except for seven months in 1950, it was active from 1948 to 1956 with the 5th Armored Division at Fort Chaffee, Arkansas, where it served as a training unit. In 1962, the 81st and the 94th Tank Battalions and the 505th Replacement Company were redesignated as the 81st Armor Regiment under the Combat Arms Regimental System, and in February of that year, the 1st and 2nd Battalions were assigned to the
1st Armored Division in the United States. In 1971, both units were inactivated when the 1st AD was moved to Germany. In 1972, the 1st Battalion, 81st Armor was reactivated in Erlangen, West Germany as part of 2nd Brigade, 1st Armored Division, where it remained until 1990, when it deployed to Kuwait as part of Operations Desert Shield and Desert Storm. In January 1996, the unit was reassigned to Fort Knox, KY as a part of the 1st Armored Training Brigade. ==History and lineage of 3rd Battalion==