July 28 – Emperor Theodosius II, age 49, falls from his horse while hunting at Constantinople and dies soon afterward. He has reigned since 408, mostly under the domination of his Christian sister Pulcheria, who has been allowed to return to court (see 441).
Marcian orders the execution (or assassination) of the unpopular court eunuch Chrysaphius. He discontinues the tribute payments to Attila.
All the Temples of Aphrodisias (City of Goddess Aphrodite) are demolished and its libraries burned down. The city is renamed Stauroupolis (City of the Cross).
June 20 – Battle of the Catalaunian Plains (Châlons): Attila avoids a pitched battle near Orléans, and withdraws to the Catalaunian Plains (Champagne-Ardenne). The Roman coalition defeats the Huns, but Theodoric I is killed in the encounter. This is one of the last military victories of the Western Roman Empire, before the victories of Emperor Majorian against the Alemanni, Visigoths, Suebi and Burgundians, between 457 and 461.[citation needed]
Rome is threatened by Attila but not attacked, due to a last-minute effort by Leo I. Threatened by news of reinforcements from the Eastern Roman Empire and the plague breaking out among the Huns, Attila is persuaded to withdraw.
July – Empress Pulcheria dies of natural causes at Constantinople.[3] She has commissioned many new churches in the city during her reign. Her death leaves Flavius Aspar (magister militum) as the dominant influence on her husband, Marcian.[4]
May 20 – Liu Shao is overthrown by another brother, Liu Jun who becomes Emperor Xiaowu of Song, and executed together with other members of his family on May 27.
May 31 – Maximus is stoned to death by an angry mob while fleeing Rome. A widespread panic occurs when many citizens hear the news that the Vandals are plundering the Italian mainland.
June 2 – Sack of Rome: King Genseric leads the Vandals into Rome, after he has promised Pope Leo I not to burn and plunder the city. Genseric sacks the city for a period of two weeks. Eudoxia and her daughters, Eudocia and Placidia, are taken hostage. The loot is sent to the harbour of Ostia and loaded into ships, from whence the Vandals depart and return to Carthage.
July 9 – Avitus is proclaimed Roman emperor at Toulouse, and later recognised by the Gallic chiefs in Viernum (near Arles).
September 21 – Avitus enters Rome with a Gallic army. He restores the imperial authority in Noricum (modern Austria) and leaves a Gothic force under Remistus, Visigoth general (magister militum), at Ravenna.
Skandagupta succeeds Kumaragupta I as ruler of the Gupta Empire (India). During his reign he crushes the Hun invasion; however, the expense of the wars drains the empire's resources and contributes to its decline.
Barter economy replaces organized trade as Romans and other citizens desert their towns for the countryside, where they will be less vulnerable to barbarian raids (approximate date).
March – Emperor Marcian sends an embassy to Carthage, to end the Vandal raids in the Mediterranean from their strongholds in North Africa, and quells disturbances on the Armenian frontier.
Summer – Capua is destroyed by the Vandals. Ricimer is unable to end piracy in the western Mediterranean. Backed by his popularity, he gains the consent of the Senate for an expedition against Avitus.
October 28 – The Visigoths brutally sack the Suebi's capital of Braga (modern Portugal); churches are burnt to the ground. Rechiar flees wounded from the battlefield.
After a 10-year reign, Emperor Ankō is assassinated by the 10-year-old Mayowa no Ōkimi (prince Mayowa), in retaliation for the execution of his father. He is succeeded by his brother Yūryaku who becomes the 21st emperor of Japan.
Summer – The Vandals land in Campania, at the mouth of the Liri or the Garigliano River, and devastate the region. Majorian personally leads the Roman army and defeats the invaders near Sinuessa, destroying their ships on the seashore, loaded with booty.
Winter – Majorian enters the Rhone Valley, and defeats the Burgundians under King Gondioc at Lugdunum. He forces the Bagaudae to join the western coalition against the Suebi in Spain.
^Shahbazi, A. Shapur (2004). "Hormozd III". In Yarshater, Ehsan (ed.). Encyclopædia Iranica, Volume XII/5: Homosexuality III–Human migration II. London and New York: Routledge & Kegan Paul. pp. 465–466. ISBN978-0-933273-79-5.