Rome's enemies (the Germans, Sarmatians and Huns) are taken into Imperial service; as a consequence, barbarian leaders begin to play an increasingly active role in the Roman Empire.
November 24 – Theodosius I makes his adventus, or formal entry, into Constantinople.
Easter Island, in the south Pacific Ocean, has been occupied by Neolithic seafarers under Hotu Matu'a ("supreme chief"), who about this time begin to fortify the island.
By topic
Arts and sciences
Important works on mathematics and astronomy are written in Sanskrit.
The Visigothic chieftain Athanaric becomes the first foreign king to visit the Eastern Roman capital of Constantinople. He negotiates a peace treaty with emperor Theodosius I that makes his people foederati as "one body within the imperial soldiery".[2] Athanaric dies 2 weeks later[3] after an 18-year reign in which he has been undisputed king of all the Goths for just 1 year. The peace will continue until Theodosius's death in 395.
The Sciri together with the Huns attack along Rome's lower Danubian frontier.[4]
October 3 – Emperor Theodosius I commands his general Saturninus to conclude a peace treaty with the Visigoths, allowing them to settle south of the Danube. They are installed as foederati in Moesia and Thrace with the title of "Allies of the Roman People", in exchange for furnishing a contingent of auxiliary troops to defend the borders.
Roman troops in Britain proclaim Magnus Maximus Emperor. He crosses over to the continent and makes Trier his capital.[8]Gaul, the Italian provinces and Hispania proclaim loyalty to him.
King Shapur III signs a treaty with Theodosius I. Armenia is divided in two kingdoms, and becomes a vassal state of the Roman Empire and Persia. The friendly relations survive for 36 years.
Asia
King Chimnyu ascends to the throne of Baekje (Korea);[11] he welcomes the Indian Buddhist monk Marananta into his palace, and later declares Buddhism the official religion.
The Battle of Fei River - Former Qin forces are defeated by the numerically inferior Eastern Jin army, preserving the Jin state in the south and precipitating the destruction of Former Qin in the north.
Jerome, Christian prophet, writes his celebrated letter "De custodia virginitatis" (vow of virginity) to Eustochium, daughter of the ascetic Paula. He has by this time completed his Vulgate translation of the Gospels.
Ambrosius refuses the request of Empress Justina for a church in Milan, where she can worship according to her Arian belief.
The Gallaeci or Gallic woman Egeria concludes her Christian pilgrimage to the Holy Land at about this date; her narrative of it, the Itinerarium Egeriae, may be the earliest surviving formal writing by a woman in western European culture.[12]
The Roman synod exiles the prophet Jerome, who has incorporated ideas first propounded by the Roman statesman Cicero. He departs for Egypt, Bethlehem, and Jerusalem, accompanied by the Christian ascetic Paula, who will edit Jerome's translation of the Bible, which becomes the Latin Vulgate.[13]
The Serapeum of Alexandria, one of the largest Greek temples in Egypt, is destroyed by a Christian mob. The precise date is disputed, with 391 sometimes given as the moment of final destruction.[15]
The Greuthungi cross the Danube to raid the Roman garrisons on the northern frontier. They are met midstream by a well-armed fleet, and their rafts and dugouts sink. Those not drowned are slaughtered.
Spring – Emperor Theodosius I increases the taxes in Antioch. A peasant uprising leads to a riot, and public buildings are set afire. Theodosius sends imperial troops to quell the disturbance, and closes the public baths and theatres.
^Mierow, Charles Christopher (1916). The gothic history of Jordanes in English version with an introduction and a commentary (2nd ed.). New Jersey: Evolution Publishing (published 2006). pp. 91–92.
^Donini, Guido; Ford, Gordon B. (1970). Isidore of Seville's History of the Goths, Vandals. Leiden: Brill. pp. 7–8.
^Heather, Peter (2010). Empires and Barbarians: The Fall of Rome and the Birth of Europe. New York: Oxford University Press. p. 222. ISBN978-0-19-973560-0.
^Socrates Scholasticus. The Ecclesiastical History: Book 5, Chapter 8.
^Mac Annaidh, S, ed. (2001). Illustrated Dictionary of Irish History. Dublin: Gill and Macmillan.
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