The 343d Wing is an inactive United States Air Force unit. Its last assignment was with Pacific Air Forces at Eielson Air Force Base, Alaska, where it was inactivated on 20 August 1993. The unit was formed at Eielson as the 343d Composite Wing and activated in October 1981 to replace the 5010th Combat Support Group. It operated both fighter and forward air control aircraft. In 1991, it also became the administrator for periodic Exercise Cope Thunder operations, which moved to Alaska from the Philippines after the eruption of Mount Pinatubo resulted in the evacuation of units from Clark Air Base When the wing was inactivated, it was replaced at Eielson by the 354th Fighter Wing.