4th Air Defense Artillery Regiment ( United States ) The 4th Air Defense Artillery Regiment was constituted 1 June 1821 in the Regular Army as the 4th Regiment of Artillery and organized from new and existing units with Headquarters at Pensacola , Florida . As a result of the division of the Artillery Corps into the Coast and Field Artillery Corps , the Regiment was broken up 13 February 1901 , and its elements reorganized and redesignated as separate numbered companies and batteries of the Artillery Corps . Early lineage . Constituted 1 June 1821 in the Regular Army as the 4th Regiment of Artillery and organized from new and existing units with Headquarters at Pensacola , Florida . B Battery , 4th Artillery was part of the Union Army ' s crack Iron Brigade in the Army of the Potomac during the Civil War . Regiment broken up 13 February 1901 and its elements reorganized and redesignated as separate numbered companies and batteries of Artillery Corps 4th Coast Artillery Regiment . The regiment was reconstituted on the 1 July 1924 in the Regular Army as the 4th Coast Artillery Regiment . As a result of inter - war reductions in military appropriations , the following reductions and increases in the force levels affected this regiment : The Regiment ( less Headquarters and Headquarters Battery ) was disbanded 3 October 1944 in the Canal Zone . Afterwards , the regiment underwent more changes with its Headquarters and Headquarters Battery , 4th Coast Artillery Regiment , reorganized and redesignated 1 November 1944 as Headquarters and Headquarters Battery , 4th Coast Artillery Group . The remainder of the regimental assets were used to organize the 4th Coast Artillery Battalion . 4th Coast Artillery Battalion . As the 4th Coast analtillery Battalion , it was reorganized and redesignated 2 January 1945 as Headquarters and Headquarters Battery , Harbor Defenses of Balboa , but was inactivated on 15 January 1947 at Fort Amador , Canal Zone . 4th Antiaircraft Artillery Group . Consolidated again on 28 June 1950 with Headquarters and Headquarters Battery , as the 4th Antiaircraft Artillery Group ( see below ) , the regiment was again consolidated as a unit and designated as the Headquarters and Headquarters Battery , 4th Antiaircraft Artillery Group activated 1 September 1951 at Ladd Air Force Base , Alaska , and inactivated 15 January 1958 at Ladd Air Force Base , Alaska Under the Combat Arms Regimental System ( CARS ) the Headquarters and Headquarters Battery , 4th Antiaircraft Artillery Group was consolidated and reorganized to include : 4th Air Defense Artillery . The 4th Field Artillery Battalion ( organized in 1907 ) consolidated , reorganized , and redesignated 1 September 1958 as the 4th Artillery Regiment , a parent regiment under the Combat Arms Regimental System . The 4th Artillery Regiment ( less former 4th Field Artillery Battalion ) was again reorganized and redesignated 1 September 1971 as the 4th Air Defense Artillery , a parent regiment under the Combat Arms Regimental System ( former 4th Field Artillery Battalion concurrently reorganized and redesignated as the 4th Field Artillery Regiment – hereafter separate lineage ) Present day . The 3rd Battalion ( Air and Missile Defense ) , 4th ADA is a battalion under the 108th ADA Brigade at Fort Bragg . They have transitioned from SHORAD to a mixed Patriot and Avenger Battalion . " 2nd ( 105mm howitzers , towed ) , 5th ( 155mm howitzers , self - propelled ) and 8th Battalions ( 175mm gun , self - propelled ) , 4th Artillery " : Commemorations . A 4th U . S . Artillery Regimental Brass Band exits that depicts the regimental band during the Civil War .