"Roman history of Ammianus Marcellinus during the reign of the emperors Constantius, Julian, Julian, Valentinian and Valens" is an outstanding work of the ancient Roman historian Ammianus Marcellinus, which is one of the main sources for studying the events of the IV century. In this book, the author describes in detail the political and military events during the reign of famous Roman emperors, revealing internal contradictions, wars, conspiracies and changes in the empire. Through the thoroughness and objectivity of his narrative, Ammianus Marcellinus depicts the realities of ancient Roman life and power, revealing key trends and events of the era. The book contains important information about Roman society, the army, religion, and culture, making it an important source for studying the history of the Roman Empire. Readers interested in ancient history and seeking insight into ancient Roman civilization will be delighted to discover Ammianus Marcellinus's enhanced Roman history.