400s
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Centuries: 4th century - 5th century - 6th century
Decades: 350s - 360s - 370s - 380s - 390s - 400s - 410s - 420s - 430s - 440s - 450s
Years: 400 401 402 403 404 405 406 407 408 409
Events:
- Constantine III seizes control of the Roman garrison in Britain, declares himself emperor, and crosses into Gaul.
- August 22, 408 - Stilicho, military power behind the imperial throne, is executed. The Roman military is leaderless for several years until Constantius III becomes patrician.
- Construction (and therefore occupation) at Great Zimbabwe begins.
- Validity limit for the information on Eastern Roman Empire in the Notitia Dignitatum.fr:Années 400