265th Air Defense Artillery Regiment

The 265th Air Defense Artillery Regiment was constituted 19 October 1923 in the Florida National Guard as the 1st Separate Battalion, coast Artillery Corps. Organized and federally recognized 14 November 1923 with Headquarters at Jacksonville. Redesignated 4 April 1924 as the 1st Separate Battalion, Coast Artillery. Redesignated 22 July 1925 as the 265th Coast Artillery Battalion. Expanded, reorganized and redesignated 20 November 1929 as the 265th Coast Artillery. Inducted into federal service 6 January 1941 at home stations. Disbanded 31 July 1944 in Alaska. Reconstituted 25 August 1945 in the Florida National Guard. Headquarters and 1st Battalion, 265th Coast Artillery, reorganized and federally recognized 5 December 1946 as the 692nd Antiaircraft Artillery Automatic Weapons Battalion, an element of the 48th Infantry division later designated as the 48th Armored Division), with Headquarters at Jacksonville. Redesignated 1 February 1949 as the 148th Antiaircraft Artillery Battalion.

2nd Battalion reorganized and federally recognized 17 December 1946 as the 712th antiaircraft Artillery Gun Battalion with Headquarters at Miami. Ordered into active federal service 1 May 1951 at home stations; released 30 April 1953 from active federal service and reverted to state control. Location of Headquarters changed 22 June 1953 to Sarasota. Redesignated 1 October 1953 as the 712th Antiaircraft Artillery Battalion. (Headquarters Battery reorganized and federally recognized 15 September 1946 at Jacksonville as Headquarters and Headquarters Battery, 227th Antiaircraft Artillery Group; hereafter, separate lineage.) 148th and 712th Antiaircraft Artillery Battalions consolidated 15 April 1959 and consolidate unit reorganized and redesignated as the 265th Artillery, a parent regiment under the Combat Arms Regimental System, to consist of the 1st Automatic Weapons Battalion and the 2nd Howitzer Battalion. Reorganized 15 February 1963 to consist of the 1st and 2nd automatic Weapons Battalions and the 16th and 17th Detachments. Reorganized 20 January 1968 to consist of the 1st Battalion. The 1st Battalion (Automatic Weapons) (Self-Propelled) was reorganized 1 October 1987 into the 1st and 3rd Battalions (Chaparral) with the Headquarters and Headquarters battery and Battery C forming Headquarters and Headquarters and Battery A of the 3rd battalion. Withdrawn from the Combat Arms Regimental System 1 October 1987 and reorganized under the United States Army Regimental System with Headquarters at Palatka.