Foote's Gunboat Flotilla in 1862 Small 320×131 Medium 640×261 Large 1024×418 Download Tiff Original 2400×980 | (4.3 MB) Description USS Pittsburgh (1861) was a City class ironclad gunboat constructed for the Union Navy during the American Civil War. Keywords Pittsburgh, Andrew H. Foote, flotilla, gunboat Galleries Steam-Powered Source: Benson John Lossing, ed. Harper's Encyclopedia of United States History (vol. 4) (New York, NY: Harper and Brothers, 1912)