Regiment. In the late 1990s the squadron was organized as a separate regimental armored cavalry squadron and was equipped with M1A1 tanks and M3A2 cavalry fighting vehicles. 1st Squadron, 108th Armored Cavalry inactivated 2007. Note the 108th Armor Regiment existed at the same time in the Georgia Army National Guard, sometimes with the same battalion numbers. 111th Armored Cavalry Regiment – Constituted and organized 1949 in the California National Guard. Broken up and units redesignated 1954. 112th Armored Cavalry Regiment – Organized 1949 in the Texas National Guard from existing units. Broken up 1959 and units redesignated or consolidated. 115th Armored Cavalry – Organized 1951 in the Wyoming Army National Guard from new and existing units. Broken up 1953 and elements redesignated as units of the 115th Field Artillery Group, which later became the 115th Field Artillery Brigade. 116th Armored Cavalry Regiment – Organized 1949 by redesignation of existing units in the Idaho Army National Guard. Redesignated 116th Cavalry Regiment 1989 as USARS parent regiment. 150th Armored Cavalry Regiment – Redesignated 1955 in the West Virginia Army National Guard from new or existing units. Redesignated 150th Armor Regiment 1993. 163rd Armored Cavalry Regiment – Redesignated 1953 in the Montana Army National Guard from existing units. Redesignated as the 163rd Cavalry Regiment in 1988. 173rd Armored Cavalry Regiment – Constituted in the Tennessee National Guard and organized 1949 from existing units. Broken up 1954 and elements redesignated as units of the 30th Armored Division or disbanded. 278th Armored Cavalry Regiment – Constituted 1977 in the Tennessee Army National Guard and organized from existing units between 1977 and 1980. Structured as a Heavy Brigade Combat Team and as of 2017 the only "heavy" ACR in the National Guard. 300 to 321 - United States Army Reserve 300th Armored Cavalry Regiment – Constituted 1948 in the Organized Reserve Corps and partially organized in Texas. Inactivated 1950 and disbanded 1950. 301st Armored Cavalry Regiment – Constituted 1948 in the Organized Reserve Corps and partially organized in Georgia. Disbanded 1950. 302nd Armored Cavalry Regiment – Constituted 1948 in the Organized Reserve Corps and partially organized in New York. Inactivated 1950 and disbanded 1952. 303rd Armored Cavalry Regiment – Reconstituted 1948 in the Organized Reserve Corps and partially organized in New York. Inactivated 1950 and disbanded 1952. Inherited lineage of prewar 303rd Cavalry Regiment. 304th Armored Cavalry Regiment – Constituted 1948 in the Organized Reserve Corps