 Butterfield was concerned about Confederate interception of aerial telegraphy signals, but he used this as an advantage, ordering deceptive messages to be transmitted early in the campaign to mask the Union Army's true intentions.Since the Union signal corpsmen could routinely decipher Confederate messages, Butterfield was able to confirm that his bogus messages had been received.It was after these incidents that the Union began deploying the cipher disc devices and improving the security of their messages.