History of the British Isles |
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The end of Roman rule in Britain occurred as the military forces of Roman Britain withdrew to defend or seize the Western Roman Empire's continental core, leaving behind an autonomous post-Roman Britain. In 383, the usurper Magnus Maximus withdrew troops from northern and western Britain, probably leaving local warlords in charge. In 407, the usurper Constantine III took the remaining mobile Roman soldiers to Gaul in response to the crossing of the Rhine, and external attacks surged. The Romano-British deposed Roman officials around 410 and government largely reverted to the city level. That year Emperor Honorius refused an appeal from Britain for military assistance. The following decades saw the collapse of urban life and the beginning of Anglo-Saxon settlement.