The first systematic attempt to reconstruct from original manuscript sources and early printed books the medieval doctrines relating to the just war, the holy war and the crusade. Despite the frequency of wars and armed conflicts throughout the course of western history, no comprehensive survey has previously been made of the justifications of warfare that were elaborated by Roman lawyers, canon lawyers and theologians in the twelfth and thirteenth century universities. After a brief survey of theories of the just war in antiquity, with emphasis on Cicero and Augustine, and of thought on early medieval warfare, the central chapters are devoted to scholastics such as Pope Innocent IV, Hostiensis and Thomas Aquinas. Professor Russell attempts to correlate theories of the just war with political and intellectual development in the Middle Ages. His conclusion evaluates the just war in the light of late medieval and early modern statecraft and poses questions about its compatibility with Christian ethics and its validity within international law.

The book covers a wide range of topics and raises issues rarely touched on in the ethics-of-war literature, such as environmental concerns and the responsibility of bystanders.

A history of medieval warfare in Europe covers the fifth through the fifteenth century and discusses armor, artillery, strategy, and courage

Many of the combatants in the European wars of the late middle ages fought for their own gain, but they observed a code of regulations, part chivalrous and part commercial which they called the ‘law of arms’. This book, originally published in 1965, examines this soldiers’ code, to understand its rules and how they were enforced. How did a soldier sue for ransom money if his prisoner would not pay it, and before what court? How did he know whether what he took by force was lawful spoil? As the answers to these and other questions reveal, the workings of the law of arms gave practical point to the contemporary cult of chivalry. It also had an important influence on the early development of ideas of international law.

While recognising the sophistication of the practice of medieval warfare, many people still have problems reconciling the widespread use of surprise and deception with the code of chivalric warfare. Was chivalry really just a meaningless veneer? If true, perhaps more perplexing are the many cases where surprise or deception were not employed and advantages were therefore sacrificed. This work argues that understanding these apparent inconsistencies requires an appreciation of the moral and legal context of medieval strategic thought. Through taking this approach, chivalric warfare can be seen for what it was - a very real framework or system of rules that allowed a result or decision to be reached which could be accepted by both sides.

While recognising the sophistication of the practice of medieval warfare, many people still have problems reconciling the widespread use of surprise and deception with the code of chivalric warfare. Was chivalry really just a meaningless veneer? If true, perhaps more perplexing are the many cases where surprise or deception were not employed and advantages were therefore sacrificed. This work argues that understanding these apparent inconsistencies requires an appreciation of the moral and legal context of medieval strategic thought. Through taking this approach, chivalric warfare can be seen for what it was - a very real framework or system of rules that allowed a result or decision to be reached which could be accepted by both sides.