Book excerpt: A military history of the campaigns of Flavius Belisarius, the greatest general of the Eastern Roman (Byzantine) Emperor Justinian. Back in the 6th century, Belisarius twice defeated the Persians and reconquered North Africa from the Vandals in a single year at the age of 29, before going on to regain Spain and Italy, including Rome (briefly), from the barbarians. This book discusses the evolution from classical Roman to Byzantine armies and systems of warfare, as well as those of their chief enemies: the Persians, Goths, and Vandals. Belisarius: The Last Roman General reassesses Belisarius’s generalship and compares him with the likes of Caesar, Alexander, and Hannibal. It is also illustrated with line drawings and battle plans as well as photographs.