 As part of the post-Vietnam reorganization, the 2nd Bn, 501st Infantry was inactivated on 31 July 1972, and in the restructuring to the U.S. Army regimental system, the 1st Bn, 501st Infantry was inactivated at Fort Campbell on 5 June 1984.In October 1989 the 501st Regiment was reorganized under the U.S. Army Regimental System with headquarters at Fort Richardson, Alaska.Simultaneously, 1st Bn (Abn), 501st Infantry was assigned to the 6th Infantry Division and activated at Fort Richardson.