What was the name of the boat sunk by the Germans in World War 1?

The boat sunk by the Germans during World War I that gained significant notoriety was the RMS Lusitania. This British ocean liner was torpedoed by a German U-boat on May 7, 1915, resulting in the deaths of 1,198 passengers and crew. The incident intensified anti-German sentiment and contributed to the United States' eventual entry into the war.