At the end of World War II, Clark Field, like so many other American bases in the Western Pacific, became a dumping ground for battle-damaged equipment. Clark was a major dumping ground for P-38 "Lightnings", the mainstay of the Allied air forces in the Pacific. After being stripped of all usable material, these aircraft were simply pushed into giant pits and covered with dirt. Such "boneyards" exist at several locations on Clark and occasionally, new construction efforts result in the rediscovery of one or more of these almost completely decomposed aircraft and equipment.