Headquarters and Headquarters Company, 31st Brigade, 30th Armored Division was reorganized and redesignated 1 November 1973 as Headquarters and Headquarters Company, 31st Armored Brigade, and relieved of assignment from the 30th Armored Division. Location changed 1 February 1979 to Northport, Alabama. In 1984-5 the 31st Armored Brigade comprised the 1st Battalion, 131st Armor Regiment, 1st-152nd Armor, 1st-167th Infantry Regiment, 1st Battalion, 117th Field Artillery, E Troop, 31st Cavalry and the 31st Engineer Company. In 2002 it started transitioning to a chemical brigade, initially designated the 122nd. In November 2002 the brigade was redesignated the 31st Chemical Brigade.