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A conditioning procedure was a type of surgical operation that would have effects similar to brainwashing. The only known practitioner of this operation was the Dark Lord of the Sith, Darth Sidious, who attempted to perform it on Wee Dunn and Zinn Toa, Force-sensitive infants to build an army of Dark side of the Force adepts, but he did not have enough time to do this, because of the intervention of Anakin Skywalker and Ahsoka Tano.[1]

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