Col. William Christensen assumed command of the 166th RSG
Col. William F. Christensen, commander of the 166th Regional Support Group passes the colors to Command Sgt. Maj. Derek Andrasic, 166th command sergeant major, during a change of command ceremony at Ft. Buchanan, Puerto Rico, Dec. 9, 2023. The passing of the colors establishes the bond as a command team and signifies that the senior NCO is entrusted with the care of the unit. (U.S. Army photo by Sgt. 1st Class David Hernandez, 1st MSC PAO)