"1824Z"^^ . . "US Army Corps of Engineers" . . "1897Z"^^ . "United States of America" . "1824-06-10Z"^^ . "Union" . . "Duane, James Chatham"@en . "James Chatham Duane (June 10, 1824 \u2013 December 8, 1897) was an engineering officer in the Union Army during the American Civil War, being the Chief Engineer of the Army of the Potomac. Duane was born in Schenectady, New York. His grandfather James Duane was a member of the Continental Congress and mayor of New York City."@en . . "1897-12-08Z"^^ . "1888Z"^^ . . . . "UnionArmyGeneral" . "James C. Duane"@en . . . . "1848Z"^^ .