 As a neutral flagged liner, "Philadelphia" was very profitable until the United States entered the war.In 1918 she was recommissioned as USS "Harrisburg" (ID # 1663) in late May, as a troop transport under the command of Commander Wallace Bertholf.For the remainder of the conflict she continued to take troops to Europe, making four voyages to England and France before the November 1918 Armistice brought an end to the fighting.