•The British ocean liner Lusitania was sunk by a German U-boat on May 7, 1915. In May 1915 the Lusitania was returning from New York to Liverpool with 1,959 passengers and crew on board. ... The sinking of the Lusitania, which had been torpedoed by a German U-boat, May 1915.
•The sinking of Lusitania didn't directly cause the United States to enter the war. It did, however, fuel virulent anti-German sentiment in Britain and the United States and hinder diplomatic relations between Germany and the United States.
