RMS Olympic was a British ocean liner and the lead ship of the White Star Line's trio of Olympic-class liners. Olympic had a career spanning 24 years from 1911 to 1935, in contrast to her short-lived sister ships, RMS Titanic and the Royal Navy hospital ship HMHS Britannic. This included service as a troopship during the First World War, which gained her the nickname "Old Reliable", and during which she rammed and sank the U-boat U-103. She returned to civilian service after the war and served successfully as an ocean liner throughout the 1920s and into the first half of the 1930s, although increased competition, and the slump in trade during the Great Depression after 1930, made her operation increasingly unprofitable. Olympic was withdrawn from service on 12 April 1935, and later sold for scrap, which was completed by 1939.