numerous independent tank battalions fielded in the European Theater of Operations. HHC, 11th Armored Group was converted and redesignated HHT, 1st Constabulary Regiment on 1 May 1946. HHT, 1st Constabulary Regiment was inactivated on 20 September 1947 in Germany. 11th Armored Cavalry Regiment Reassembly and organizing of 11th ACR was completed on 30 November 1948 by reconstitution and reorganization of elements of the 11th Cavalry Regiment and HHT, 1st Constabulary Regiment. HHT-1st Constabulary Regiment was converted, redesignated and consolidated into 11th ACR as HHT, 3rd Battalion, 11th ACR on 30 November 1948. 11th Tank Battalion was consolidated into 11th ACR on 8 January 1951. 95th Tank Battalion was consolidated into 3rd Battalion, 11th ACR on 1 October 1958. Air Troop inactivated 20 March 1972 in Vietnam; 2d Squadron inactivated 6 April 1972 in Vietnam; Air Troop and 2d Squadron activated 17 May 1972 in Germany. Around 1984, Air Troop was enlarged and became the 4th Squadron (Thunderhorse), also known as the Combat Aviation Squadron. Placed 17 June 1986 under the United States Army Regimental System Inactivated 15 October 1993 – 15 March 1994 in Germany Activated 16 October 1994 (less 3d and 4th Squadrons; the Air Defense Artillery Battery; and the Howitzer Batteries, 1st and 2d Squadrons) at Fort Irwin, California West Germany (1957–64) As part of the Gyroscope unit rotations, the 11th ACR was sent to West Germany in March 1957 for another round at the border surveillance mission along the Iron Curtain, replacing the 6th Armored Cavalry Regiment. Regimental headquarters and 1st Squadron were located in Straubing while the 2nd Squadron was stationed in Landshut and the 3rd Squadron in Regensburg. The regiment's border surveillance mission was along the German-Czech frontier. In 1964, the 11th ACR returned to the United States and would be bound for Vietnam within two years. South Vietnam (1966–72) Home now for the regiment was Fort Meade, Maryland where the "Blackhorse" engaged in operational training and support activities like participation in the Presidential Inauguration and support for ROTC summer training. With the war in South Vietnam escalating, the Blackhorse Regiment was alerted for assignment to Southeast Asia on 11 March 1966. The regiment began specialized training for combat in a counterinsurgency environment. Modifications were made to the organization and equipment (MTOE) with emphasis on the use of modified M113 armored personnel carriers (APCs). Two M-60 machineguns with protective gun shield were mounted at the