David S. Bachrach is professor of medieval history at the University of New Hampshire. His research focuses on the military and administrative history of Carolingian East Francia/ Ottonian Germany in the ninth-eleventh century and the kingdom of England in the thirteenth and early fourteenth centur...

David S. Bachrach is professor of medieval history at the University of New Hampshire. His research focuses on the military and administrative history of Carolingian East Francia/ Ottonian Germany in the ninth-eleventh century and the kingdom of England in the thirteenth and early fourteenth century. He is the author of more than 60 scholarly articles and a dozen books, including Religion and the Conduct of War c. 300-c.1215 (Woodbridge, 2003); Warfare in Tenth-Century Germany (Woodbridge, 2012); and Administration and Organization of War in Thirteenth-Century England (London, 2020).

Bernard S. Bachrach, a fellow of the Medieval Academy, is professor emeritus of medieval history at the University of Minnesota. His research focuses on the military history of pre-Crusade Europe. He is the author of more than 160 scholarly articles and 25 books, including Early Carolingian Warfare: Prelude to Empire (Philadelphia, 2002); Charlemagne's Early Campaigns (768-777): A Diplomatic and Military Analysis (Leiden, 2013); and Writing the Military History of Pre-Crusade Europe: Studies in Sources and Source Criticism (London, 2020), with David S. Bachrach.