Magnus Maximus - Role in British and Breton History

Role in British and Breton History

Maximus' bid for imperial power in 383 coincides with the last date for any evidence of a Roman military presence in Wales, the western Pennines, and the fortress of Deva. Coins dated later than 383 have been found in excavations along Hadrian's Wall, suggesting that troops were not stripped from it, as was once thought. In the De Excidio et Conquestu Britanniae written c. 540, Gildas says that Maximus left Britain not only with all of its Roman troops, but also with all of its armed bands, governors, and the flower of its youth, never to return.

Having left with the troops and senior administrators, and planning to continue as the ruler of Britain in the future, his practical course was to transfer local authority to local rulers. Welsh legend supports that this happened, with stories such as Breuddwyd Macsen Wledig (English: The Dream of Emperor Maximus), where he not only marries a wondrous British woman (thus making British descendants probable), but also gives her father sovereignty over Britain (thus formally transferring authority from Rome back to the Britons themselves).

The earliest Welsh genealogies give Maximus (referred to as Macsen/Maxen Wledig, or Emperor Maximus) the role of founding father of the dynasties of several medieval Welsh kingdoms, including those of Powys and Gwent. He is given as the ancestor of a Welsh king on the Pillar of Eliseg, erected nearly 500 years after he left Britain, and he figures in lists of the Fifteen Tribes of Wales.

After he became emperor of the Western Roman Empire, Maximus would return to Britain to campaign against the Picts and Scots (i.e., Irish), probably in support of Rome's long-standing allies the Damnonii, Votadini, and Novantae (all located in modern Scotland). While there he likely made similar arrangements for a formal transfer of authority to local chiefs—the later rulers of Galloway, home to the Novantae, would claim Maximus as the founder of their line, the same as did the Welsh kings.

The ninth century Historia Brittonum gives another account of Maxiumus and assigns him an important role:

The seventh emperor was Maximianus. He withdrew from Britain with all its military force, slew Gratianus the king of the Romans, and obtained the sovereignty of all Europe. Unwilling to send back his warlike companions to their wives, families, and possessions in Britain, he conferred upon them numerous districts from the lake on the summit of Mons lovis, to the city called Cant Guic, and to the western Tumulus, that is Cruc Occident. These are the Armoric Britons, and they remain there to the present day. In consequence of their absence, Britain being overcome by foreign nations, the lawful heirs were cast out, till God interposed with his assistance.

Modern historians believe that this idea of mass British troop settlement in Brittany by Maximus may very well reflect some reality, as it accords with other historical evidence and later Breton traditions.