3rd Air Defense Artillery Regiment - Wikipedia2022-08-24
520th CA Battalion redesignated as 3rd CA Battalion 1 December 1944. [1] 3rd CA Battalion, 521st CA Battalion, and 522nd CA Battalion, disbanded 15 September 1945 at Fort MacArthur, California. [1] Reconstituted 28 June 1950 in the Regular Army and redesignated as Headquarters and Headquarters Battery, 3rd Antiaircraft Artillery Group.
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