 By this time most of the original Montanan troops had been discharged.The Montana ARNG maintained the 163rd Armored Cavalry Regiment (whose roots date back to 1884), at least until 1988.In 1985 its units included the 1/163 Cavalry, the 2/163 Cavalry, the 3/163 Cavalry (based in Texas), an Air Troop, an Attack Helicopter Troop (based in Utah), and the 1063rd Engineer Company.