Constituted 8 March 1898 in the
Regular Army as the "6th Regiment of Artillery". Organized 23 March 1898 at
Fort McHenry, Maryland. Colonel
Edward B. Williston, a Medal of Honor recipient for actions in the Civil War, was the regiment's first commander. Order of battle information indicates that the regiment did not deploy outside the U.S. in the
Spanish–American War of 1898. However, the regiment has battle honors for the Philippine Insurrection (a.k.a.
Philippine–American War) that closely followed it. The regiment garrisoned portions of the
Harbor Defenses of San Francisco. Headquarters and headquarters battery (HHB) and Batteries A, E, and K were the only components initially activated. HHB and Batteries A and E at Fort Winfield Scott, Battery K at
Fort Baker. • After 18 October 1944, the above units underwent changes as follows: Headquarters and Headquarters Battery (HHB), 6th Coast Artillery, reconstituted 28 June 1950 in the Regular Army concurrently consolidated with HHB,
6th Antiaircraft Artillery Group, (see Annex 1) and consolidated unit designated as Headquarters Battery, 6th Artillery Group. Activated 1 February 1952 at
Fort Bliss, Texas. Redesignated 20 March 1958 as Headquarters and Headquarters Battery,
6th Artillery Group. Inactivated 1 September 1971 at Fort Bliss, Texas.
Annex 1 (6th AAA Group) Constituted 5 August 1942 in the
Army of the United States as Headquarters and Headquarters Battery, 6th Antiaircraft Artillery Automatic Weapons Group (or 6th Coast Artillery Group (AA)). Activated 21 August 1942 at Camp Haan, California. Redesignated 26 May 1943 as HHB, 6th Antiaircraft Artillery Group. Inactivated l May 1946 at
Camp Kilmer, New Jersey. Redesignated 13 October 1948 as the 25th Antiaircraft Artillery Automatic Weapons Battalion and allotted to the Regular Army. Assigned 20 March 1949 to the
25th Infantry Division and activated in Japan. ==Current units==