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Unit History

1-1 ADA Unit Crest

Constituted 1 June 1821 in the Regular Army as the 1st Regiment of Artillery and organized from existing units with Headquarters at Fort Independence, Massachusetts. Regiment broken up 13 February 1901 and its elements reorganized and redesignated as separate numbered companies and batteries of Artillery Corps. Reconstituted 1 July 1924 in the Regular Army as the 1st Coast Artillery and partially organized with Headquarters at Fort de Lesseps, Canal Zone. (1st Battalion activated 1 June 1926 at Fort Randolph, Canal Zone; inactivated 31 July 1926 at Fort Randolph, Canal Zone; 1st and 2nd Battalions activated 15 April 1932 at Forts Sherman and Randolph, Canal Zone, respectively; 3rd Battalion activated 15 March 1940 at Fort Randolph, Canal Zone; 1st and 2nd Battalions inactivated 30 March 1941 at Forts Randolph and Sherman, Canal Zone, respectively; 1st and 2nd Battalions activated 17 April 1942 at Fort Sherman, Canal Zone). The regiment was broken up 1 November 1944 and its elements reorganized and redesignated as follows: Headquarters and Headquarters Battery as Headquarters and Headquarters Battery, 1st Coast Artillery Group; remainder of regiment as the 1st Coast Artillery Battalion.

After 1 November 1944, the above units underwent changes as follows: Headquarters and Headquarters Battery, 1st Coast Artillery Group, redesignated 2 January 1945 as Headquarters and Headquarters Battery, Harbor Defenses of Cristobal. Inactivated 15 January 1947 at Fort Sherman, Canal Zone. Redesignated 21 June 1950 as Headquarters and Headquarters Battery, 1st Antiaircraft Artillery Group. Consolidated 18 November 1952 with Headquarters and Headquarters Battery, 1st Antiaircraft Artillery Group and consolidated unit designated as Headquarters and Headquarters Battery, 1st Antiaircraft Artillery Group. Activated 15 April 1953 in Germany. Inactivated 26 December 1957 in Germany.

The regiment was broken up 1 November 1944 and its elements reorganized and redesignated as follows: Headquarters and Headquarters Battery as Headquarters and Headquarters Battery, 1st Coast Artillery Group; remainder of regiment as the 1st Coast Artillery Battalion. After 1 November 1944, the above units underwent changes as follows: Headquarters and Headquarters Battery, 1st Coast Artillery Group, redesignated 2 January 1945 as Headquarters and Headquarters Battery, Harbor Defenses of Cristobal. Inactivated 15 January 1947 at Fort Sherman, Canal Zone. Redesignated 21 June 1950 as Headquarters and Headquarters Battery, 1st Antiaircraft Artillery Group.

1st Coast Artillery Battalion disbanded 1 February 1946 at Fort Sherman, Canal Zone. Reconstituted 21 June 1950 in the Regular Army and redesignated as the 1st Coast Artillery, consisting of the 1st and 2nd Battalions concurrently redesignated as the 1st and 5th Antiaircraft Battalions, respectively.

1st Antiaircraft Battalion redesignated 17 March 1955 as the 1st Antiaircraft Artillery Missile Battalion. Activated 15 April 1955 at Irwin, Pennsylvania. Inactivated 1 September 1958 at Irwin, Pennsylvania. 54th Antiaircraft Battalion redesignated 15 December 1954 as the 54th Antiaircraft Artillery Missile Battalion and activated at the United States Army Chemical Center, Maryland.

Headquarters and Headquarters Battery, 1st Antiaircraft Artillery Group; 1st and 54th Antiaircraft Artillery Missile Battalions; and the 1st Field Artillery Battalion (organized 1907) consolidated, reorganized, and redesignated 19 March 1959 as the 1st Artillery, a parent regiment under the Combat Arms Regimental System

1st Artillery (less former 1st Field Artillery Battalion) reorganized and redesignated 1 September 1971 as the 1st Air Defense Artillery, a parent regiment under the Combat Arms Regimental System (former 1st Field Artillery Battalion concurrently reorganized and redesignated as the 1st Field Artillery – hereafter separate lineage). Withdrawn 16 June 1987 from the Combat Arms Regimental System and reorganized under the United States Army Regimental System with Headquarters at Fort Bliss, Texas.

From February 2003 to may 2003, the Battalion served in support of operation Iraqi freedom. Alpha and Bravo batteries deployed to provide Air Defense for the Kingdom of Bahrain, while the balance of the battalion deployed to Kuwait in support of operation there.

In February of 2006, the battalion was informed that they would deploy to Okinawa, Japan, to provide Air Defense for key assets in the Pacific region. The 1-1 Air Defense Artillery Regiment was restationed to Kadena Airbase 30 November 2006.