1915 - Sinking of the Lusitania
May 7, 1915 - Germany dominates Europe's war. A German submarine sinks a British passenger ship, the Lusitania. Nearly 1,200 non-military people, or "civilians," die, including more than 100 Americans. Germany claims the ship is carrying war supplies. But the British deny it. The American public begins to support U.S. involvement in the war.