The 311th Armored Cavalry Regiment (311th ACR) was a Texas and Louisiana-based reconnaissance unit of the United States Army Organized Reserve Corps, which briefly existed after World War II.
It was constituted in 1948, partially organized from existing units later that year, and inactivated in 1950.
After being inactivated at Camp Cooke on 14 November 1945, it was redesignated HHT, 311th Cavalry Group, Mechanized in the Organized Reserves on 2 January 1947 before being activated 8 January at Fort Worth.
It was first constituted on 21 April 1944 as the 127th Cavalry Reconnaissance Squadron and activated on 1 May at Fort Riley.
[1] The 311th ACR did not inherit the lineage of the prewar 311th Cavalry Regiment, and was not authorized a coat of arms or distinctive unit insignia.