USS Nevada (BB-36), the second United States Navy ship to be named after the 36th state, was the lead ship of the two Nevada-class battleships; her sister ship was Oklahoma. Nevada was a giant leap forward in dreadnought technology, as she showcased four new features that would be included on almost every subsequent U.S. battleship: gun turrets with three guns, anti-aircraft guns, oil in place of coal for fuel, and the "all or nothing" armor principle. All of these new features resulted in Nevada becoming the first U.S. Navy "super-dreadnought". Nevada served in both of the World Wars: during World War I, Nevada was based in Bantry Bay, Ireland, for the last few months of the war to support the supply convoys that were sailing to and from Great Britain. In World War II, she was one of the battleships that were trapped when the Japanese attacked Pearl Harbor on 7 December 1941. Subsequently salvaged and modernized at Puget Sound Navy Yard, Nevada served in four amphibious assaults: the Normandy Landings and the invasions of Southern France, Iwo Jima, and Okinawa. At the end of World War II, the Navy decided that Nevada was too old to be retained in the post-war fleet, so they assigned her to be a target ship in the Bikini atomic experiments of July 1946. After being hit by two atomic bombs, she was still afloat but heavily damaged and radioactive. She was sunk during naval gunfire exercise in 1948.