The 33rd Armor Regiment was an armored regiment in the United States Army first formed in 1941. In 2005, the 33rd Armor was redesignated 33rd Cavalry Regiment. The 1st Squadron, 33rd Cavalry Regiment, a part of the 3rd Brigade Combat Team, 101st Airborne Division, carries on the lineage of 33rd Armor Regiment. Lineage Constituted 13 January 1941 in the Regular Army as the 3rd Armored Regiment and assigned to the 3rd Armored Division. Activated 15 April 1941 at Camp Beauregard, Louisiana. Redesignated 8 May 1941 as the 33rd Armored Regiment. Inactivated 10 November 1945 in Germany. Regiment broken up 7 July 1947 and its elements redesignated as follows: Regimental Headquarters and Headquarters Company, Headquarters and Headquarters Company, 1st Battalion, and Companies A, D, E, and F as the 33rd Tank Battalion, and remained assigned to the 3rd Armored Division. Headquarters and Headquarters Company, 3rd Battalion, and Companies G and H as the Service Company and Companies B and C, respectively, 7th Tank Battalion, and remained assigned to the 3rd Armored Division (remainder of the 7th Tank Battalion organized from elements of the 32nd Armored Regiment). Headquarters and Headquarters Company, 2nd Battalion, Companies B, C, and I, Service and Maintenance Companies, and Band disbanded. (Reconnaissance Company as Troop E, 83rd Mechanized Cavalry Reconnaissance Squadron—hereafter separate lineage). After 7 July 1947 the above units underwent changes as follows: 7th and 33rd Tank Battalions activated 15 July 1947 at Fort Knox, Kentucky. Reorganized and redesignated 30 July 1948 as the 7th and 33rd Medium Tank Battalions, respectively. Reorganized and redesignated 15 March 1955 as the 7th and 33rd Tank Battalions, respectively. 7th and 33rd (less Company D) Tank Battalions inactivated 1 October 1957 in Germany and relieved from assignment to the 3rd Armored Division. Headquarters and Headquarters Company, 2nd Battalion; Service Company; and Companies B, C, and I, 33rd Armored Regiment, reconstituted 28 May 1948 in the Regular Army as Headquarters, Headquarters and Service Company, and Companies B, C, and A, respectively, 62nd Heavy Tank Battalion. 62nd Heavy Tank Battalion assigned 18 June 1948 to the 10th Infantry Division. Activated 1 July 1948 at Fort Riley, Kansas. Reorganized and redesignated 15 June 1954 as the 62nd Tank Battalion. Inactivated 1 July 1957 in Germany. Relieved 1 October 1957 from assignment to the 10th Infantry Division. Maintenance Company, 33rd Armored Regiment, reconstituted 1 October 1957 in the Regular Army. 33rd and 62nd Tank Battalions;