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The Secret War for the Union: The Untold Story of Military Intelligence in the Civil War

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"A treasure trove for historians . . . A real addition to Civil War history" (Kirkus Reviews, starred review).


At the end of the American Civil War, most of the intelligence records disappeared—remaining hidden for over a century. As a result, little has been understood about the role of espionage and other intelligence sources, from balloonists to signalmen with their telescopes.


When, at the National Archives, Edwin C. Fishel discovered long-forgotten documents—the operational files of ...