Intelligence in the Civil War

"Though the idea of centralized intelligence gathering was decades away, the age-old resistance to the idea was present even then. Neither side saw the need to create such intelligence organizations, but each side approached the idea of effectively acquiring intelligence in their own way.... Each side still used age-old intelligence techniques, such as code-breaking, deception, and covert surveillance. However, into this modern war came two innovations that would endure as tools of espionage: wiretapping and overhead reconnaissance. What follows is a look at some of the highlights of how the North and the South gathered and used their information, the important missions, and the personalities. From this special view, the focus is not on the battlefield, but on a battle of wits." Source: Central Intelligence Agency

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