Col. William Christensen assumed command of the 166th RSG
Col. Brian J. Slaughter, outgoing commander of 166th Regional Support Group receives the colors from Command Sgt. Maj. Derek Andrasic, 166th command sergeant major, during a change of command ceremony at Ft. Buchanan, Puerto Rico, Dec. 9, 2023. This receipt of the colors signifies the start of the chain of command. (U.S. Army photo by Sgt. 1st Class David Hernandez, 1st MSC PAO)