RMS Lusitania Sinking of the RMS Lusitania. RMS Lusitania RMS "Lusitania" was a British ocean liner and briefly the world's largest passenger ship. The ship was sunk on 7 May 1915 by a German U-boat off the southern coast of Ireland. The sinking presaged the United States declaration of war on Germany in 1917. The ship was a holder of the Blue Riband appellation for the fastest Atlantic crossing and was briefly the world's largest passenger ship until the completion of her sister ship . The Cunard Line launched "Lusitania" in 1906, at a time of fierce competition for the North Atlantic
German submarine U-972 "U-972", it is reported that she sank by one of her own circling T5 torpedoes. But now it is believed she was sunk by Allied Warships. This was her first and only patrol during World War II. The real reason of her sinking is still unknown as her last resting place remains lost. German submarine U-972 German submarine "U-972" was a Type VIIC U-boat of Nazi Germany's "Kriegsmarine" during World War II. The "U-972" was laid down on 15 June, 1942 at the Blohm & Voss yard in Hamburg, Germany. She was launched on 22 February 1943 and commissioned on