What was a non-military British ship that was sunk by the Germans in WW1

On May 7, 1915, less than a year after World War I (1914-18) erupted across Europe, a German U-boat torpedoed and sank the RMS Lusitania, a British ocean liner en route from New York to Liverpool, England. Of the more than 1,900 passengers and crew members on board, more than 1,100 perished, including more than 120 Americans. Nearly two years would pass before the United States formally entered World War I, but the sinking of the Lusitania played a significant role in turning public opinion against Germany, both in the United States and abroad.