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A History Book Club Reading Selection Surveillance and Spies in the Civil War represents pathbreaking research on the rise of U.S. Army intelligence operations in the Midwest during the American Civil War and counters long-standing assumptions about Northern politics and society. At the beginning of the rebellion, state governors in Ohio, Indiana, and Illinois cooperated with federal law enforcement officials in various attemptsall failedto investigate reports of secret groups and individuals who opposed the Union war effort. Starting in 1862, army commanders took it upon themselves to initiate investigations of antiwar sentiment in those states. By 1863, several of them had established intelligence operations staffed by hired civilian detectives and by soldiers detailed from their units to chase down deserters and draft dodgers, to maintain surveillance on suspected persons and groups, and to investigate organized resistance to the draft.