In his brief life/career, Jackson to my knowledge never showed the same inventiveness that Sherman had in cutting loose his supply lines. That took phenomenal courage and faith, ironically, that one would think Jackson might have had. No matter how good he was, or how good Lee was (and I think Lee was not as good as the myths have him being), either was doomed by an "aggressive defensive" strategy that refused to trade territory for strategic advantage. Had VA been abandoned, and the western Confed. been pulled into the Mississippi line, it would have been enormously difficult for the North to have won.