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3rd Battalion - 265th Air Defense Artillery Regiment (Avenger)

The 265th Air Defense Artillery Regiment was initially constituted on 19 October 1923 in The Florida National Guard as the 1st Separate Battalion, Coast Artillery Corps. It organized and was federally recognized on 14 November 1923 with Headquarters at Jacksonville. It was re-designated on 4 April 1924 as the 1st Separate Battalion, Coast Artillery and on 22 July 1925 as the 265th Coast Artillery Battalion. It expanded, reorganized and was re-designated on 20 November 1929 as the 265th Coast Artillery. It was inducted into federal service on 6 January 1941 at home stations. The unit disbanded on 31 July 1944 in Alaska.

It was reconstituted on 25 August 1945 in the Florida National Guard. Headquarters and the 1st Battalion, 265th Coast Artillery, reorganized and were federally recognized on 5 December 1946 as the 692nd Antiaircraft Artillery Automatic Weapons Battalion, an element of the 48th Infantry Division (later re-designated as the 48th Armored Division), with Headquarters at Jacksonville. It was re-designated on 1 February 1949 as the 148th Antiaircraft Artillery Battalion.

The 2nd Battalion reorganized and was federally recognized on 17 December 1946 as the 712th Antiaircraft Artillery Gun Battalion with Headquarters at Miami. It was ordered into active federal service on 1 May 1951 at home station; and released on 30 April 1953 from active federal service and reverted to state control. The Location of Headquarters changed on 22 June 1953 to Sarasota.

The unit was re-designated on 1 October 1953 as the 712th Antiaircraft Artillery Battalion. (Headquarters Battery reorganized and was federally recognized on 15 September 1946 at Jacksonville as Headquarters and Headquarters Battery, 227th Antiaircraft Artillery Group - hereafter separate lineage). The 148th and 712th Antiaircraft Artillery Battalions consolidated on 15 April 1959 and the consolidated unit was reorganized and re-designated 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.

It reorganized on 15 February 1963 to consist of the 1st and 2nd Automatic Weapons Battalions and the 16th and 17th Detachments; and on 20 January 1968 to consist of the 1st Battalion.

The unit was re-designated on 1 November 1972 as the 265th Air Defense Artillery. It reorganized pm 1 October 1988 to consist of the 1st and 3rd Battalions. It was withdrawn on 1 June 1989 from the Combat Arms Regimental System, with Headquarters at Daytona Beach and was reorganized on 20 April 1990 to consist of the 1st, 2nd, and 3rd Battalions.