On May 7, 1915, the British ocean liner RMS Lusitania, which primarily ferried people and goods across the Atlantic Ocean between the United States and Great Britain, was torpedoed by a German U-boat and sunk. The sinking of the Lusitania enraged Americans and hastened the United States' entrance into World War I.
The Lusitania sunk within 18 minutes. Though there had been enough lifeboats for all passengers, the severe listing of the ship while it sunk prevented most from being launched properly. Of the 1,959 people on board, 1,198 died. The toll of civilians killed in this disaster shocked the world.
Watch video documentary below.