This military history of Ancient Rome analyses the empire’s revitalized push against rising enemies to the East. In the century since Rome’s defeat of the Seleucid Empire in the 180s BC, the East was dominated by the rise of new empires: Parthia, Armenia, and Pontus, each vying to recreate the glories of the Persian Empire. By the 80s BC, the Pontic Empire of Mithridates had grown so bold that it invaded and annexed the whole of Rome’s eastern empire and occupied Greece itself. But as Rome emerged from the devastating effects of the First Civil War, a new breed of general emerged with it, eager to re-assert Roman military dominance and carve out a fresh empire in the east. In Rome’s Great Eastern War, Gareth C. Sampson analyses the military campaigns and battles between a revitalized Rome and the various powers of the eastern Mediterranean hinterland. He demonstrates how this series of conflicts ultimately heralded a new phase in Roman imperial expansion and reshaped the ancient East.