This work investigates the complex geopolitical and military dynamics governing the Roman-Persian frontier from the Peace of Jovian in 363 AD to the conclusion of the Byzantine-Sasanian War in 628 AD. Geoffrey Greatrex and Samuel N. C. Lieu, both established scholars in late antique history, synthesize a vast array of primary sources to reconstruct the shifting borders and diplomatic tensions between these two superpowers. The authors argue that the frontier was not merely a static line of defense, but a fluid zone of constant military engagement, diplomatic negotiation, and cultural exchange that fundamentally shaped the late Roman and Sasanian states.

Historians and students of late antiquity frequently cite this volume as a primary reference for the military history of the eastern Roman frontier. Scholars note the meticulous attention to source material and the clarity with which the authors navigate the complex political shifts of the period.