From the Viking invasions to the Crusades to the Hundred Years War, wars were crucial agents of change in medieval Europe. They fostered many economic and political changes. They also affected the science, technology, religion, and culture of the parties involved.

This three-volume encyclopedia examines all aspects of warfare and military technology in medieval times. Featuring the latest research from the leading experts in medieval military history it provides an exhaustive and accurate view of how and why wars were waged throughout Europe, the Byzantine Empire, and the Crusader States from circa 500 CE to circa 1500.