The two Arctic brigades, the 171st (4-9th Infantry, 1-47th Infantry was subsequently deactivated, and other components at Fort Wainwright) and the 172d (4-23d Infantry, 1-60th Infantry, 1-37th Artillery, 561st Combat Engineer Company, and other components at Fort Richardson) were consolidated in 1973 with the drawdown after Viet Nam. There was an administrative split between the "LIB" (Light Infantry Brigade) and the "Brigade Alaska", with the 1-43d Air Defense, 222d Aviation, 56th MP Company, 23d Construction Engineer Company, Northern Warfare Training Center- then at Fort Greely,' being assigned.