William B. KurtzWilliam B. Kurtz is the managing director and digital historian at the John L. Nau III Center for Civil War History. He is the author of Excommunicated from the Union: How the Civil War Created a Separate Catholic America. Books by the Author Previous slide in carousel New Perspectives on the Union War New Perspectives on the Union War Soldiers of the Cross, the Authoritative Text Excommunicated from the Union Next slide in carousel