The 317th Armored Cavalry Regiment (317th ACR) was an Illinois-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, and inactivated in 1950.
[1] The 1st Battalion was redesignated from the 316th Mechanized Cavalry Reconnaissance Squadron, constituted on 20 April 1944 as the 129th Cavalry Squadron and activated on 1 May at Fort Riley.
The regiment's HHC and 1st Battalion inactivated on 15 November 1950 at Chicago.
The 317th ACR did not inherit the lineage of the prewar 317th Cavalry Regiment, and was not authorized a coat of arms or distinctive unit insignia.