F-106 of the Montana ANG on flight line. In 1972, the unit was redesignated the 120th Fighter-Interceptor Group and assigned the F-106 Delta Dart, the first Air National Guard unit to receive this aircraft. With the F-106, the squadron competed in and won its first William Tell, a live-fire missile competition held at Tyndall AFB, Florida. Performed air defense duties along the northern tier of the United States until 1978 when ADCOM was merged into Tactical Air Command. Continued air defense mission for ADTAC component of TAC with the F-106s, transferring to First Air Force when ADTAC was replaced in 1985.