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
Battle of Santiago de Cuba the more powerful U.S. Navy. Before taking command of the Spanish Caribbean Squadron, Cervera had served a variety of military and political roles, retiring after a dispute with opposing politicians. However, when war with the United States broke, Cervera was recalled into the Spanish Navy and given command of the Caribbean Squadron. This squadron was to be dispatched from Spain with the ultimate destination of the Caribbean, initially Puerto Rico but then changed to Cuba, to reinforce the Spanish garrison, to defend the island from American invasion, and to break the American naval blockade. Before the outbreak of war, Cervera