Sherman was known as an outstanding field commander who used modern industrial, mechanized, and total warfare methods against Confederate armies, notably during the Atlanta and Carolinas campaigns. He is considered one of the first modern generals.
Sherman is also known for his infamous "March to the Sea" which was a military campaign conducted through the Confederate states of Georgia and South Carolina from November 15 to December 21, 1864. During the march, Union forces under Sherman's command engaged in a "scorched-earth" policy, burning and destroying everything of military value, as well as civilian infrastructure, in order to break the will of the Confederate army and population.
William T Sherman was a controversial figure during his lifetime, and his methods of warfare were criticized by many. However, he remains one of the most significant figures in American military history, and his contributions to the Union victory in the Civil War cannot be overstated.