I agree that what Sherman did, using prisoners to probe for mines, was uncivilized.
I will also hope you agree that what Wheeler did, planting mines that would resonably and forseeably pose a significant hazard to civilians after the war was over, was also uncivilized.
The difference: Sherman gave his orders to bring Wheeler back to responsible behavior. It worked.
:I will also hope you agree that what Wheeler did, planting mines that would reasonably and foreseeable pose a significant hazard to civilians after the war was over, was also uncivilized.”
If that is what Wheeler did, I agree.