The wing deployed personnel and aircraft to expeditionary bases in the United Kingdom, France, Germany, and Spain as part of the Kosovo War (NATO "Operation Allied Force") in 1999. That year, the Wing became the 92d Air Expeditionary Wing at Morón Air Base in Spain, tasked with providing fuel to NATO aircraft involved in the war. In addition to serving as the HQ 92 AEW (serving units in France, Crete, Sicily and Spain), Morón hosted 37 tankers (KC-135 and KC-10) and 800 personnel. The 92 AEW became the largest tanker wing since the Vietnam War and held the distinction of being the largest tanker base during the Kosovo War.