How did the union wage total war on the south?

General Sherman was assigned this task by General Grant. This Total War started against mostly helpless farmers in the Shenandoah Valley. There were very few Confederate Troops there but it was a Highway for the Confederate Armies to move. In the late summer of 1864, Sherman and his Army burned about 2000 Civilian homes, 7000 livestock and killed everything in sight. This crippled the Confederates abilities to receive and produce supplies. From the Shenandoah Valley Sherman moved South destroying anything in his path all the way to Atlanta and Savannah Georgia. When his army finally turned back north, it destroyed everything again up until reached N.C. These tactics broke the hearts and minds of the Confederate Civilians and Soldiers.