Gary W. Gallagher is professor of history at the University of Virginia. He is a contributing editor of The Kent State University Press publications Antietam: Essays on the 1862 Maryland Campaign (1989); Struggle for the Shenandoah: Essays on the 1864 Valley Campaign (1991); The First Day at Gettysburg: Essays on Confederate and Union Leadership (1992); and Three Days at Gettysburg: Essays on Confederate and Union Leadership (1999).