Sub-Roman Britain (Cavalry etc)

[Agraes]

Directly related to the subject at hand, tradition claims the Bretons had an excellent cavalry at this point in time (470). I would think that a cavalry was not exclusive to Armorica, but also riding upon the isle itself. And as you once pointed out, Riothamus was a British general and not exclusive to Armorica. The Riothamus affair also gives an indication that Britain had manpower to spare at this point in the 5th century. This directly opposes the "hysterical" picture presented by Gildas and Nennius, of Britains hiding in the pucker-brush, or cringing while Saxons yanked them from the Wall with grappling hooks.

Enough manpower to settle parts of the continent, and not as a flee - at least not for the elites. Not only what will became Brittany, but also the Loire valley and several colonies in the rest of northern Gaul, plus Galicia in Spain (a strategical region on the Atlantic roads).
Enough territory for Arvandus to told Euric to attack the Britons/Bretons, to share Gaul with the Burgonds...

We however have no clue of Breton cavalry as early as 470. Except of course the Early Breton Laws if we accept they date back to the 5th century, and do refer a lot about horses. Breton cavalry fame is mostly known from IXth century, of course it's quite possible that their cavalry tradition was much earlier like I stated in a previous post.