My favorite books on crusading warfare

If, as Napoleon once quipped, an army indeed marches on its stomach, then surely military historians should work from a firm understanding of logistics and sustainment. Conceived during a 2002 workshop on the subject held in Sydney, Australia, this volume includes fourteen substantive chapters authored by some of the foremost historians in the field, as well as one specialist in game theory! The covered subjects are impressive in scope: provisioning, finance, rates of march, supply and resupply, cartography, roads, and communications (for both Christian armies and their Muslim foes), with due attention given not only to land warfare but also naval affairs. Fourteen maps, seven figures, and sixteen data tables complete what is currently the best available book on medieval logistics.

The subtitle gives it away—this is my (and, I’m guessing, most other medieval military historians’) go-to book for that most famous of crusades. France masterfully combines a captivating narrative with abundant historical detail, keen tactical/operational/strategic analyses, and expert interpretation. Each chapter is a delight, but not to be missed is France’s discussion of medieval generalship, his close study of army sizes, and especially the three full chapters on the fighting in and around Antioch in 1097-1098—which still constitute the best scholarly treatment of the events there. Despite a rash of newer works on the First Crusade over the last three decades, this remains the standard treatment for those interested in the war’s martial contours.

Morton is quickly making a name for himself in military history circles, and this book won the 2022 Verbruggen Prize for best medieval military history book (awarded by De Re Militari: the Society for Medieval Military History). On the heels of his successful 2018 book on the Battle of the Field of Blood in 1119, here Morton examines the size, structure, and deployment of military forces in the four Crusader States. Along the way, he sketches a military narrative of Levantine events from the end of the First Crusade through Saladin’s triumph at the Battle of Hattin. Concluding with two thought-provoking chapters on the interpretation of battles and cross-cultural exchanges between Christian and Muslim combatants, this book updates the subfield of crusading warfare in interesting ways.

Not all crusades were concerned with Jerusalem. This book is the best military account of crusading within Christendom: the war against the so-called Cathar heretics in Languedoc (today, southern France). Launched by Pope Innocent III in the early thirteenth century, the crusade drew in an assortment of European elites, including Simon de Montfort and King Peter II of Aragon, who fought battles, raided territories, and dealt with heretic insurgents in a struggle over both territorial rights and confessional orthodoxy. Marvin’s operational and tactical analysis of the campaigns during the crusade provides a needed complement to more conventional social and religious approaches to the subject of heresy.

A classic. Originally published in 1956, it was one of the first retorts to the dominant strain of military history that emphasized decisive battle, as seen through the eyes of 19th-century theory. Instead, Smail advances the notion—now widely held—that medieval warfare deemphasized risky battles and instead utilized a range of effective operational approaches (raiding, ravaging, sieging, and skirmishing) in a coherent, positional fashion. Similarly in opposition to older approaches, Smail examines not only western warfare through the activities of crusader and crusader-state armies but also how Muslim forces were organized, sustained, and fought. While his sections on military organization, fortifications, and technology have been greatly updated by newer studies, this remains a standard text for anyone interested in the general subject.