Elizabeth R. Varon is Langbourne M. Williams professor of American history at the University of Virginia and a member of the executive council of UVA’s John L. Nau III Center for Civil War History. Varon’s books include Longstreet; Southern Lady, Yankee Spy: The True Story of Elizabeth Van Lew; A Union Agent in the Heart of the Confederacy; and Appomattox: Victory, Defeat, and Freedom at the End of the Civil War. Her book, Armies of Deliverance: A New History of the Civil War, won the 2020 Gilder Lehrman Lincoln Prize and was named one of The Wall Street Journal’s best books of 2019.