This volume brings together articles by John France covering aspects of the military and crusading history of the Middle Ages, both in Europe and the Near East. An interest in understanding how war worked and why informs a first group of articles, ranging from Carolingian armies to the organisation of war in the 13th century. The focus then turns to the Crusades, the most ambitious conquests of the era. The volume also includes a major unpublished analysis, co-authored with Nicholas Morton, of the problems faced by the local Islamic powers in the early Crusading period.