The 111th Sustainment Brigade is a sustainment brigade of the New Mexico Army National Guard, headquartered at Rio Rancho. The brigade was organized as the 111th Air Defense Artillery Brigade of the United States Army. The 200th Air Defense Artillery Regiment was reorganized on 1 September 1975 to consist of the 1st Battalion, an element of the 49th Armored Division; the 2nd Battalion, an element of the 47th Infantry Division; the 3rd Battalion, an element of the 50th Armored Division; and the 4th Battalion, an element of the 40th Infantry Division. 1st Battalion headquarters was at Roswell, 2nd Battalion at Las Cruces, 3rd Battalion at Albuquerque, and 4th Battalion at Tucumcari. Equipped with the M42 Duster self-propelled anti-aircraft gun, the battalions served as divisional air defense