Here's how the war affected White Star:
11 November 1918: World War I ends. In 1914, White Star owned or operated 31 ocean-going ships. Ten of these were war casualties: Delphic I, Cymric, Afric, Arabic II, Victorian (which had been returned to the Leyland Line and renamed Russian), Armenian (which had also been returned to Leyland), and Southland were torpedoed; Laurentic I was sunk by mines; Oceanic II was wrecked; and Georgic I was scuttled by a German raider. Two others ships survived but never returned to White Star: Teutonic and Cevic were permanently taken by the Government. In addition, Britannic II, the third of the Olympic class liners, which had been launched but not completed when the war began, was lost to a mine, and Justicia, placed under White Star management after being completed in 1915, was lost to torpedoes. As severe as White Star's losses were, they could have been worse. Among the survivors, Persic and Celtic II were hit by torpedoes and survived; Celtic and Lapland hit mines and survived; Celtic, Baltic II, Megantic, Zealandic, Ceramic (twice) and Belgic IV were attacked by U-boats but were missed by or outran them. And Olympic earned the nickname "Old Reliable" by carrying over 200,000 troops, traveling 180,000 miles, sinking a U boat, attempting to rescue a sinking battleship, and escaping U boat attack at least four times. In all, White Star ships carried over half a million troops and 4 million tons of cargo during the war. (Sources: Williams' Wartime Disasters at Sea; de Kerbrech's Ships of the White Star Line; Eaton & Haas' Falling Star; Mills' RMS Olympic: The Old Reliable; Rentell's Historic White Star Liners.)