The last great historian to write in Latin, Ammianus Marcellinus was born in Syrian Antioch c.330 CE. He served in the Roman army in Gaul and in campaigns against the Persians, and was an officer in the Praetorian Guard. On the usurpation of Marcellus in 366 CE, he wrote umbram principatus funesti capessit (he seized the shadow of a fatal principate).
A continuation of Tacitus’ Histories in 31 books, of which the first thirteen books are lost. It covers from Nerva (96 CE) to the disastrous defeat of Valens by the Goths at Adrianople in 378 CE. He is rather truthful in his writing, but he is scornful of the lower class.