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
Society of the Army of Santiago de Cuba all officers and soldiers of the United States Army (including Acting Assistant Surgeons and authorized Volunteer Aides), who constituted the expeditionary force to Santiago de Cuba and who worthily participated in the campaign between the dates of June 14 and July 17, 1898, and who shall signify their wish for membership by making application and paying the dues. There shall be three classes of membership, namely: First, Original Members; Second, Members by Inheritance, to consist of lineal male descendants of Original Members; and, Third, Members by Succession, to consist of those male blood relatives of the first or second class