Editing 407 (section)

=== By place ===

==== Roman Empire ====
* [[Gratian (usurper)|Gratian]], [[Roman usurper]], is installed as emperor after the death of [[Marcus (usurper)|Marcus]]. According to [[Orosius]], he is a native [[Britons (historical)|Briton]] of the urban [[aristocracy]]. 
* Gratian is [[assassination|assassinated]]<ref>{{cite book |last1=Birley |first1=Anthony R. |title=The Roman Government of Britain |date=29 September 2005 |publisher=OUP Oxford |isbn=978-0-19-925237-4 |page=458 |url=https://books.google.com/books?id=qkkVDAAAQBAJ&q=gratian |access-date=5 February 2024 |language=en}}</ref> and [[Constantine III (Western Roman Emperor)|Constantine III]], a general (''[[magister militum]]''), declares himself [[Roman Emperor|Roman emperor]]. To extend his dominion over [[Gaul]] and [[Spain]], he takes practically all the Roman [[garrison]]s from [[Roman Britain|Britain]] and crosses the [[English Channel]]. Constantine occupies [[Arles]] and establishes tenuous authority over Gaul, sharing control with marauding "barbarians". This is generally seen as the beginning of [[Rome]]'s withdrawal from Britain.
* [[End of Roman rule in Britain]]: After 360 years of occupation, the local regional British-Roman leaders raise their own levies for defence against [[Anglo-Saxons|Saxon]] sea rovers. They cultivate [[oyster]]s, having learned the technique from the [[Roman Empire|Romans]].

==== China ====
* [[Helian Bobo|Liu Bobo]] (Xia Wuliedi) founds the state of [[Xia (Sixteen Kingdoms)|Xia]], and claims the title "Heavenly Prince" (''[[Tian Wang]]'').
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