For the cleaning product 409®, see butoxyethanol. For the area code, see Area code 409.

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Events

By Place

Western Roman Empire

• Constantine III's general Gerontius revolts in Hispania, and elevates his own candidate for emperor, Maximus.
• The Vandals, Alans and Suevi break through Constantine III's garrisons into Hispania. They share the Iberian Peninsula by drawing lots, with the Vandals getting Hispania Baetica (modern Andalusia), the Suevi Gallaecia (modern Galicia and northern Portugal) and the Alans Lusitania (the rest of modern Portugal and Spanish Extremadura).
• Visigothic King Alaric I lays siege to Rome a second time; with agreement of the Senate he sets up Priscus Attalus as western emperor
• Famine strikes Hispania, Gaul and the Italian Peninsula.

Asia

• Ming Yuan Di succeeds Dao Wu Di as ruler of the Chinese Northern Wei Dynasty (see Northern dynasties).