RMS Lusitania was a British ocean liner, holder of the Blue Riband and briefly the world's biggest ship. She was launched by the Cunard Line in 1907, at a time of fierce competition for the North Atlantic trade. In 1915 she was torpedoed and sunk by a German U-boat, causing the deaths of 1,198 passengers and crew.
As German shipping lines tended to monopolise the lucrative passage of continental emigrants, Cunard responded by trying to outdo them for speed, capacity and luxury. Lusitania and her running mate Mauretania were fitted with revolutionary new turbine engines, able to maintain a speed of 25 knots. Equipped with lifts, wireless telegraph and electric light, they provided 50% more passenger space than any other ship, and the first class decks were noted for their sumptuous furnishings.
When she left New York for Liverpool on what would be her final voyage on 1 May 1915, submarine warfare was intensifying in the Atlantic. Germany had declared the seas around the United Kingdom to be a war-zone, and the German embassy in the United States had placed a newspaper advertisement warning people not to sail on Lusitania. On the afternoon of 7 May, Lusitania was torpedoed by a German U-Boat, 11 mi (18 km) off the southern coast of Ireland and inside the declared "zone of war". A second internal explosion sent her to the bottom in 18 minutes.