Here are some possible sources:

http://deovindice.org/1/post/2013/10/war-crimes-committed-by-federal-forces-during-the-war-for-southern-independence.html
http://www.lewrockwell.com/2001/09/thomas-dilorenzo/targeting-civilians/
http://www.examiner.com/article/generals-sherman-and-sheridan-the-war-criminals
http://www.barnesandnoble.com/w/war-crimes-against-southern-civilians-walter-cisco/1030559747

Citizen Sherman: A Life of William Tecumseh Sherman (Modern War Studies) by Michael Fellman