History, Volume I - Books 14¿19

Ammianus (c. 325-c. 395 CE), a Greek from Antioch, served many years as an officer in the Roman army, then settled in Rome, where he wrote a Latin history of the Roman Empire. The portion that survives covers twenty-five years in the historian's own lifetime: the reigns of Constantius, Julian, Jovian, Valentinian I, and Valens.