In March 1998, the 351st ARS participated in Exercise Strong Resolve 98 at Sola Air Station, Norway. After the European Tanker Task Force (ETTF) was ended on 28 November 1998, the number of KC-135s assigned to the 351st ARS was increased to 15 tankers. In 1999, the squadron supported Operation Allied Force, NATO intervention during the Kosovo War, as the 351st Expeditionary Air Refueling Squadron (351st EARS).