In recent decades, there has been an increasing focus on elucidating the details of Christianisation processes in the Roman Empire. While there are several studies dealing with the relationship of war and Christianity in Late Antiquity, there are hardly any works which concentrate on the change in cult practices in the Roman army. The present volume is therefore dedicated to precisely this topic. It traces the development of the Christianisation of the army cult, shows that the area of responsibility of the later soldier-saints was already prefigured in Late Antiquity, and explains why officers still acted as cult functionaries at the end of the 6th century.