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 Monte Santiago whole conflict), and lacked larger ships to challenge the control of the river; at the same time, the losses sustained by the Brazilians during the previous battles discouraged them from extending the naval war into the interior rivers of Argentina and the shallow waters of attempting a direct attack against Buenos Aires. This situation continued until the Preliminary Peace Convention, by which Oriental Province became the independent nation of Uruguay. Battle of Monte Santiago The naval Battle of Monte Santiago was fought on 7–8 April 1827, between the Argentine Navy and Brazilian Imperial Navy, during the Cisplatine War. It was