1st Squadron - 278th Armored Cavalry Regiment
"Warrior"

The 1st Squadron, 278th Armored Cavalry Regiment is part of the only enhanced ACR within the National Guard, and one of only two Armored Cavalry Regiments in the United States Army. The Regiment is headquartered in Knoxville, Tennessee, and the 1st Squadron Headquarters is located in Athens, Tennessee.

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 2d Battalion, 117th Infantry at Athens (organized and Federally recognized 30 April 1923 at Athens as Company E, 117th Infantry; redesignated 1 May 1938 as Company B, 117th Infantry; inducted into Federal service 16 September 1940 at Athens; inactivated 24 November 1945 at Fort Jackson, South Carolina; redesignated 31 July 1946 as Headquarters and Headquarters Company, 1st Battalion, 278th Infantry; reorganized and Federally recognized 1 September 1947 at Athens; ordered into active Federal service 1 September 1950 at Athens; released from active Federal service and reorganized at Athens as Headquarters and Headquarters Company, 278th Infantry, 8 September 1954; redesignated 27 October 1954 as Headquarters, Headquarters and Service Company, 278th Armored Infantry Battalion; redesignated 1 March 1959 as Headquarters and Headquarters Company, 2d Armored Rifle Battalion, 117th Infantry; redesignated 1 April 1963 as Headquarters and Headquarters Company, 2d Battalion, 117th Infantry), redesignated 1 May 1977 as Headquarters and Headquarters Troop, 1st Squadron

Company B 2d Battalion, 117th Infantry at Cleveland (organized and Federally recognized 20 April 1926 at Cleveland as Company C, 117th Infantry; redesignated 30 July 1926 as Company G, 117th Infantry; redesignated 1 May 1938 as Company C, 117th Infantry; inducted into Federal service 16 September 1940 at Cleveland; inactivated 24 November 1945 at Fort Jackson; redesignated 31 July 1946 as Headquarters and Headquarters Company, 278th Infantry; reorganized and Federally recognized 1 September 1947 at Cleveland; ordered into active Federal service 1 September 1950 at Cleveland; released from active Federal service 8 September 1954 and reorganized at Cleveland as Headquarters and Head quarters Company, 1st Battalion, 278th Infantry; redesignated 27 October 1954 as Company B, 278th Armored Infantry Battalion; redesignated 1 March 1959 as Company B, 2d Armored Rifle Battalion, 117th Infantry; redesignated 1 April 1963 as Company B 2d Battalion, 117th Infantry), redesignated 1 May 1977 as Troop A, 1st Squadron

Support Company 2d Battalion, 117th Infantry at Sweetwater (constituted 31 July 1946 in the Tennessee National Guard as Company C, 278th Infantry; organized and Federally recognized 4 March 1947 at Sweetwater; ordered into active Federal service 1 September 1950 at Sweetwater; released from active Federal service and reverted to State control, 8 September 1954; redesignated 27 October 1954 as Company C, 190th Armored Infantry Battalion; redesignated 1 March 1959 as Detachment 1, Headquarters and Headquarters Company 2d Armored Rifle Battalion, 117th Infantry; redesignated 1 April 1963 as Detachment 1, Headquarters and Headquarters Company, 2d Battalion, 117th Infantry; redesignated 1 February 1968 as Detachment 1, Company C 2d Battalion, 117th Infantry; redesignated 1 February 1972 as Detachment 1, Support Company 2d Battalion, 117th Infantry; redesignated Support Company 2d Battalion, 117th Infantry in 1975), redesignated 1 May 1977 as Troop B, 1st Squadron

Company C 2d Battalion, 117th Infantry at Lenoir City (constituted 31 July 1946 in the Tennessee National Guard as Company B, 278th Infantry; organized and Federally recognized 14 November 1947 at Lenoir City; ordered into active Federal service 1 September 1950 at Lenoir City; released from active Federal service and reverted to State control, 8 September 1954; redesignated 27 October 1954 as Headquarters, Headquarters and Service Company, 190th Armored Infantry Battalion; redesignated 1 March 1959 as Company D, 2d Armored Rifle Battalion, 117th Infantry; redesignated 1 April 1963 as Company C, 2d Battalion, 117th Infantry), redesignated 1 May 1977 as Detachment 1, Troop B 1st Squadron

376th Signal Company at Newport (organized and Federally recognized 1 November 1975 at Newport), redesignated 1 May 1977 as Troop C, 1st Squadron

Detachment 1, 130th Military Police Company at Oak Ridge (constituted 19 December 1942 in the Army of the United States as Battery C, 114th Coast Artillery Battalion [Antiaircraft]; activated 10 February 1943 at Fort Bliss, Texas; redesignated 28 June 1943 as Battery C, 114th Antiaircraft Artillery Gun Battalion; inactivated 9 July 1946 in France; allotted to the Tennessee Army National Guard, 1 July 1951; reorganized and Federally recognized 29 September 1953 at Oak Ridge; redesignated 1 October 1953 as Battery C, 114th Antiaircraft Artillery Battalion; redesignated 1 March 1959 as Company C, 5th Medium Tank Battalion, 109th Armor; redesignated 1 April 1963 as Company C, 5th Battalion, 109th Armor; redesignated 1 November 1973 as Detachment 1, 130th Military Police Company), redesignated 1 May 1977 as Company D, 1st Squadron

Company A, 2d Battalion, 117th Infantry at Maryville (organized and Federally recognized 26 May 1924 at Maryville as Headquarters Detachment and Combat Train, 2d Battalion, 178th Field Artillery; redesignated 16 May 1925 as Battery D, 178th Field Artillery: redesignated 1 April 1938 as Battery D, 115th Field Artillery; redesignated 1 February 1940 as Battery D, 191st Field Artillery; inducted into Federal service 24 February 1941 at Maryville; redesignated 8 February 1943 as Battery A, 959th Field Artillery Battalion; inactivated 5 March 1946 at Camp Kilmer, New Jersey; redesignated 31 July 1946 as Headquarters and Headquarters Battery, 191st Field Artillery Battalion; reorganized and Federally recognized 10 February 1947 at Maryville; ordered into active Federal service 1 September 1950 at Maryville; released from active Federal service and reverted to State control, 8 October 1954; reorganized and redesignated 27 October 1954 as Headquarters and Headquarters Battery, 191st Armored Field Artillery Battalion; redesignated 1 March 1959 as Headquarters and Headquarters Battery, 2d Howitzer Battalion, 115th Artillery; redesignated 1 April 1963 as Headquarters, Headquarters and Service Battery, 2d Battalion, 115th Artillery; redesignated 1 February 1968 as Company A, 2d Battalion, 117th Infantry), redesignated 1 May 1977 as Howitzer Battery, 1st Squadron