He specializes in the social and military history of the Middle Ages, with particular interests in Medieval England, the relationship of church and state, and the study of knighthood and chivalry. Courses he has offered cover a number of medieval topics, including: the Crusades, the Age of Chivalry, and the Anglo-Scottish wars of the fourteenth century. Dr. Hass holds degrees from Franciscan University (B.A.), the University of Toronto (M.A.) and the University of Leeds (M.A. and Ph.D.). Ave Maria University