Mark Grimsley is an associate professor of history at Ohio State University. He is the author of "The Hard Hand of War: Union Military Policy toward Southern Civilians, 1861-1865" and coauthor of "The Collapse of the Confederacy" (Nebraska 2001). Clifford J. Rogers is an associate professor of history at the United States Military Academy. He is the author of "War Cruel and Sharp: English Strategy under Edward III, 1327-1360" and editor of "The Military Revolution Debate: Reading on the Military Transformation of Early Modern Europe,"