Although the Byzantine Empire was a continuation of thr Roman Empire and faced similar military problems, its solutions were very different. In North Africa, for example, Rome's large army concentrated on securing main roads and urban centres. Byzantium's smaller army built more fortifications and took a defensive stance. The most striking characteristic of later Byzantine military thinking was, however, the theme, or provincial army system, which owed nothing to ancients Roman tradition. With eight superb full colour plates by Angus McBride, and many other illustractions, David Nicolle examines the history of Romano-Byzantine armies from the 4th to the 9th century AD.