3rd Squadron - 278th Armored Cavalry Regiment

The three Cavalry Troops of each Squadron are each equipped with nine M1A1 Abrams Main Battle Tanks, 13 M3A2 Bradley Fighting Vehicles, and two 120mm Mortar carriers. The Howitzer Battery, is equipped with six of the 155mm M109 SP Howitzers. The Tank Company is equipped with 14 M1A1 Abrams Main Battle Tanks. Rounding out this combat power are two more M3A2 Bradley Fighting Vehicles for the Squadron Commander and his S-3.

Headquarters and Headquarters Company, 3d Battalion, 117th Infantry at Cookeville (organized and Federally recognized 31 May 1926 at Cookeville as Troop A, 109th Cavalry; redesignated 1 May 1938 as Troop 1, 109th Cavalry; redesignated 1 October 1940 as Battery C, 181st Field Artillery; inducted into Federal service 24 February 1941 at Cookeville; redesignated 1 March 1943 as Battery C, 181st Field Artillery Battalion; inactivated 21 December 1945 at Camp Stoneman, California; redesignated 31 July 1946 as Headquarters and Headquarters Company, 765th Tank Battalion; reorganized and Federally recognized 6 February 1947 at Cookeville; redesignated 15 September 1949 as Headquarters and Headquarters Company 3d Battalion, 173d Armored Cavalry; redesignated 27 October 1954 as Headquarters, Headquarters and Service Company, 230th Reconnaissance Battalion; redesignated 1 March 1959 as Headquarters and Headquarters Troop, 1st Reconnaissance Squadron, 109th Armor; redesignated 1 April 1963 as Headquarters and Headquarters Troop, 1st Squadron, 230th Cavalry; redesignated 1 February 1968 as Headquarters and Headquarters Company, 3d Battalion, 117th Infantry), redesignated 1 February 1980 as Headquarters and Headquarters Troop, 3d Squadron

Company A, 3d Battalion, 117th Infantry at McMinnville (constituted 3 December 1941 in the Army of the United States as Company A, 775th Tank Destroyer Battalion; activated 16 December 1941 at Camp Forrest, Tennessee; allotted to the Tennessee National Guard, 21 February 1942; redesignated 15 April 1944 as Company A, 728th Amphibian Tractor Battalion; inactivated 15 December 1945 on Luzon, Philippine Islands; redesignated 31 July 1946 as Company A, 765th Tank Battalion; reorganized and Federally recognized 21 October 1947 at McMinnville; redesignated 15 September 1949 as Company G, 173d Armored Cavalry; redesignated 27 October 1954 as Company A, 230th Reconnaissance Battalion; redesignated 1 March 1959 as Troop A, 1st Reconnaissance Squadron, 109th Armor; redesignated 1 April 1963 as Troop A, 1st Squadron, 230th Cavalry; redesignated 1 February 1968 as Company A, 3d Battalion, 117th Infantry), redesignated 1 February 1980 as Troop I, 3d Squadron

Detachment 1, Company A, 3d Battalion, 117th Infantry at Smithville (organized and Federally recognized 2 February 1953 at Smithville as Company A, 168th Military Police Battalion; redesignated 1 March 1959 as 130th Military Police Company; redesignated 1 February 1968 as Detachment 1, Company B, 3d Battalion, 117th Infantry; redesignated 1 January 1977 as Detachment 1, Company A, 3d Battalion, 117th Infantry), redesignated 1 February 1980 as Detachment 1, Troop 1, 3d Squadron

Support Company, 3d Battalion, 117th Infantry at Livingston (constituted 31 July 1946 as Company D, 765th Tank Battalion and allotted to the Tennessee National Guard; organized and Federally recognized 13 November 1947 at Livingston; redesignated 15 September 1949 as Company 1, 173d Armored Cavalry; redesignated 27 October 1924 as Company C, 230th Reconnaissance Battalion; redesignated 1 March 1959 as Troop C, 1st Reconnaissance Squadron, 109th Armor; redesignated 1 April 1963 as Troop C, 1st Squadron, 230th Cavalry; redesignated 1 February 1968 as Detachment 1, Headquarters and Headquarters Company, 3d Battalion, 117th Infantry; redesignated 1 November 1971 as Support Company, 3d Battalion, 117th Infantry), redesignated 1 February 1980 as Troop K, 3d Squadron

Detachment 1, Company B, 3d Battalion, 117th Infantry at Jamestown (organized and Federally recognized 1 November 1971 at Cookeville as Detachment 1, Company A, 3d Battalion, 117th Infantry; redesignated 1 January 1977 as Detachment 1, Company B, 3d Battalion, 117th Infantry; relocated to Jamestown, 1 October 1978), redesignated 1 February 1980 as Detachment 1, Troop K, 3d Squadron

Detachment 1, Support Company, 3d Battalion, 117th Infantry at Crossville (constituted 3 December 1941 in the Army of the United States as Company B, 775th Tank Destroyer Battalion; activated 16 December 1941 at Camp Forrest; allotted to the Tennessee National Guard, 21 February 1942; redesignated 15 April 1944 as Company B, 728th Amphibian Tractor Battalion; inactivated 15 December 1945 on Luzon, Philippine Islands; redesignated 31 July 1946 as Company B, 765th Tank Battalion; reorganized and Federally recognized 11 July 1947 at Crossville; redesignated 15 September 1949 as Company H, 173d Armored Cavalry; redesignated 27 October 1954 as Company D, 230th Reconnaissance Battalion; redesignated 1 March 1954 as Troop D, 1st Reconnaissance Squadron, 109th Armor; redesignated 1 April 1963 as Detachment 1, Headquarters and Headquarters Troop, 1st Squadron, 230th Cavalry; redesignated 1 February 1968 as Detachment 1, Company A, 3d Battalion, 117th Infantry; redesignated 1 November 1971 as Detachment 1, Support Company, 3d Battalion, 117th Infantry), redesignated 1 February 1980 as Troop L, 3d Squadron

Detachment 1, Company C, 3d Battalion, 117th Infantry at Harriman (constituted 15 October 1954 as Company A, 190th Armored Infantry Battalion and allotted to the Tennessee Army National Guard; organized and Federally recognized 23 November 1954 at Harriman; redesignated 1 March 1959 as Company A, 5th Medium Tank Battalion, 109th Armor; redesignated 1 April 1963 as Company A, 5th Battalion, 109th Armor; redesignated 1 February 1968 as Detachment 1, Company C, 3d Battalion, 117th Infantry), redesignated 1 February 1980 as Detachment 1, Troop L, 3d Squadron

Company C, 3d Battalion, 117th Infantry at Rockwood (constituted 31 July 1946 as Company M, 278th Infantry and allotted to the Tennessee National Guard; organized and Federally recognized 12 November 1947 at Rockwood; ordered into active Federal service 1 September 1950 at Rockwood; released from active Federal service and reverted to State control 8 September 1954; redesignated 27 October 1954 as Company D, 190th Armored Infantry Battalion; redesignated 1 March 1959 as Company D, 5th Medium Tank Battalion, 109th Armor; redesignated 1 April 1963 as Company B 5th Battalion, 109th Armor: redesignated 1 February 1968 as Company C 3d Battalion, 117th Infantry), redesignated 1 February 1980 as Company M, 3d Squadron

Company B, 3d Battalion, 117th Infantry at Sparta (constituted 3 December 1941 in the Army of the United States as Company C, 775th Tank Destroyer Battalion; activated 16 December 1941 at Camp Forrest; allotted to the Tennessee National Guard 21 February 1942; redesignated 15 April 1944 as Company C, 728th Amphibian Tractor Battalion; inactivated 15 December 1945 on Luzon, Philippine Islands; redesignated 31 July 1946 as Company C, 765th Tank Battalion; reorganized and Federally recognized 17 September 1947 at Sparta: redesignated 15 September 1949 as Tank Company, 3d Battalion, 173d Armored Cavalry; redesignated 27 October 1954 as Company B, 230th Reconnaissance Battalion; redesignated 1 March 1959 as Troop B, 1st Reconnaissance Squadron, 109th Armor: redesignated 1 April 1963 as Troop B, 1st Squadron, 230th Cavalry; redesignated 1 February 1968 as Company B, 3d Battalion, 117th Infantry), redesignated 1 February 1980 as Howitzer Battery, 3d Squadron