In the end, he did rout out the enemy, and took Atlanta and later Savannah. I thought it was interesting that he held to his convictions about war, which he basically said is "Hell". He did not glorify war at all. He realized that destruction and cruelty were part of the war and that war itself could not be refined.
I think I would characterize General Sherman as a wise man, who used strategy, and stern measures to complete his objectives.