As part of a First Army realignment of training support brigades, the Department of the Army approved a change of station for First Army – Division West and two of its training support brigades. The 166th Aviation Brigade moved to Fort Hood, Texas on 15 July 2009. The brigade's Active Component battalions, all of which are aviation units, moved at a later date, most likely the summer 2010 (with the exception of 1st Battalion, 291st Regiment, which was already located at the installation). The 166th Aviation Brigade inactivated at Fort hood on 24 June 2015. The 166th Aviation Brigade reactivated at Fort Hood on 17 August 2018.