The first movements of the campaign had actually begun on June 23 when elements of the Reserve Corps under Granger, with a cavalry division under Mitchell, moved due west from Murfreesboro to Triune to begin an elaborate feint. This was designed to play into Bragg's assumption that the main attack would come on his left flank in the direction of Shelbyville. At the same time, the XXI Corps division of John Palmer moved to Bradyville, well beyond the Confederate right flank, where he could push back Confederate cavalry and move in the direction of Manchester, getting into the Confederate rear. It was only after these movements were under way that Rosecrans brought his corps commanders together to hear the detailed orders for the upcoming campaign.