367 CE Picts, Scots and Attacotti attack Britannia
369 CE Theodosius restores order
390 CE Magnus Maximus killed in Gaul
399 CE Stilicho restores order
401 CE Stilicho withdraws troops to defend Italy
407 CE Constantine III (usurper) denudes Britain of troops to defend Gaul
410 CE Honorivs gives military responsibility to the civil powers in Britain
425 CE Vortigern (high king) leads Britons
430 CE Vortigern grants Thanet to Saxons in return for military assistance
435 CE Saxon federates settled around London, Oxford and the Humber and the Wash estuaries
440 CE Vortigern moves Cunedda from Manu Goddodin to found the dynasty of Gwynedd
442 CE Saxon mercenaries rebel
446 CE Appeal to Aetius for help goes unanswered
460 CE Migration of western Britons to Armorica (Brittany) begins