In late 1943, elements of the United States Army XV Corps arrived in Northern Ireland, later establishing a headquarters base at Kircassock House, Co. Down.
563rd Quartermaster Battalion
Headquarters and Headquarters Detachment, 563rd Quartermaster Battalion was part of XV Corps, US Army when they arrived in Donaghcloney, Co. Down in 1944.
4049th Quartermaster Truck Company
4049th Quartermaster Truck Company served as part of United States Army XV Corps based in Northern Ireland in preparation for the Normandy Invasion on 1944.