This study of the Roman Empire’s combat with its rivals to the east examines the evolution of ancient military strategy and tactics. During the Perso-Roman wars of 337-363, Roman forces abandoned their traditional reliance on a strategic offensive to bring about a decisive victory. Instead, the Emperor Constantius II adopted a defensive strategy and conducted a mobile defense based upon small frontier forces defending fortified cities. These forces were then supported by limited counteroffensives by the Field Army of the East. These methods successfully checked Persian assaults for twenty-four years. However, when Julian became emperor, his access to greater resources tempted him to abandon mobile defense in favor of a major invasion aimed at regime change in Persia. Although he reached the Persian capital, he failed to take it. In fact, he was defeated in battle and killed. The Romans subsequently resumed and refined the mobile defense, allowing the Eastern provinces to survive the fall of the Western Empire. In this fascinating study, John Harrel applies his personal experience of military command to a strategic, operational, tactical and logistical analysis of these campaigns and battles, highlighting their long-term significance.

In 53 BC, Roman and Parthian forces collided in a confrontation that would reshape the geopolitical map and establish a frontier between East and West that would endure for the next 700 years. From the initial clash at Carrhae through to the battle of Nisibis more than 250 years later, Roman and Parthian forces fought a series of bloody campaigns for mastery of the Fertile Crescent. As Roman forces thrust ever deeper into the East, they encountered a civilization unlike any they had crossed swords with before. Originating in the steppes of Central Asia, the Parthians ruled a federated state stretching from the Euphrates to the Indus. Although Rome's legions were masters of the battlefield in the Mediterranean, the Parthians refused to fight by the rules as Rome understood them. Harnessing the power of the composite bow and their superior manoeuvrability, the Parthians' mode of warfare focused exclusively on the horse. They inflicted a bloody defeat on the legions at Carrhae and launched their own invasion of Roman territory, countered only with great difficulty by Rome's surviving forces. The Parthians were eventually thrown out, but neither side could sustain a permanent ascendancy over the other and the conflict continued. Packed with stunning artwork, including battlescenes, maps and photographs, this title examines the conflict through the lens of three key battles, revealing a clash between two armies alien to each other not only in culture but also in their radical approaches to warfare.

New History is a historical narrative by Zosimus. The author was a Greek historian known for condemning Constantine's rejection of the traditional polytheistic religion.

This ambitious series gives the reader a comprehensive narrative of late Roman military history from 284-641. Each volume (5 are planned) gives a detailed account of the changes in organization, equipment, strategy and tactics among both the Roman forces and her enemies in the relevant period, while also giving a detailed but accessible account of the campaigns and battles. Volume I covers the period 284-361, starting with recovery from the 'third-century crisis' and the formation of the Tetrarchy. Constantine's civil wars and stabilization.are also major themes, with the pattern repeated under his sons. Constantius II's wars against the usurper Magnentius, the Danubian tribes and the Sassanid Persians illustrate the serious combination of internal and external threats the Empire faced at this time. The author discusses these and the many other dramatic military events in their full context and puts forward some interesting conclusions on strategic and tactical developments. He argues, for example, that the Roman shift from infantry to cavalry as the dominant arm occurred considerably earlier than usually accepted. Anyone with an interest in the military history of this period will find it both informative and thought-provoking.

In Battles and Generals: Combat, Culture, and Didacticism in Procopius’ Wars, Whately reads Procopius’ descriptions of combat through the lens of didacticism, arguing that one of Procopius’ intentions was to construct those accounts not only so that they might be entertaining to his audience, but also so that they might provide real value to his readership, which was comprised, in part, of the empire’s military command. In the course of this analysis we discover that the varied battles and sieges that Procopius describes are not generic; rather, they have been crafted to reflect the nature of combat – as understood by Procopius – on the three fronts of Justinian’s wars, the frontier with Persia, Vandal north Africa, and Gothic Italy.

Collects and translates such diverse sources as Zosimus, John Malalas, Al-Tabari and Moses of Chorene, to give us a picture of this complex, fraught period of Roman history.