376. Driven by the Huns, the Visigoths are admitted into the Roman Empire south of the Danube.
378. Death of Emperor Valens in an encounter with the Visigoths at Adrianople.
Gaul is invaded by the Alemanni; they are repulsed by Gratian.
379. Theodosius is recalled from his retirement in Spain and awarded the sovereignty of the East by Gratian.
380. Theodosius is baptized by the Bishop of Thessalonica.
381. Second general council, held at Constantinople.
382. Theodosius makes a treaty with the Visigoths; their final settlement in Thrace and Mœsia.
383. Rebellion of Maximus in Britain; he lands in Gaul, where he is joined by the forces there; he overthrows Gratian.
387. Maximus invades Italy. Valentinian flees with his mother and sister, Galla, to Thessalonica; Theodosius meets them, marries Galla, and prepares to meet Maximus.
388. Maximus is defeated and slain.