Seavey's Island side of Seavey's Island at the former site of Camp Long, a stockade named for Secretary of the Navy John Long, where 1,612 prisoners of war from the Battle of Santiago de Cuba were confined from July 11 to mid-September 1898 during the Spanish–American War. Camp Heywood, a Marine camp named after Colonel Charles Heywood, was located just north of the naval prison. It was occupied after the 1st Battalion's return from Cuba in late August until September 21, 1898. According to the National Trust for Historic Preservation, the Portsmouth Naval Shipyard has 62 buildings listed on the National Register
USS Santiago de Cuba (1861) elusive Southern warships. On 21 June 1863, "Santiago de Cuba" overtook "Victory" off Palmetto Point, Eleuthera Island, ending a long chase after the British steamer had slipped through the blockade off Charleston with a cargo of cotton, tobacco, and turpentine. On the 25th, she took steamer, "Britannia", in the same area. On 15 July, she boarded steamer, "Lizzie", east of the Florida coast and sent the prize to Key West, Florida for trial. Late in the year, "Santiago de Cuba" sailed north for repairs and decommissioned on 30 December 1863. Overhaul completed, the side wheeler recommissioned on 6 June 1864