Around a third of William the Conqueror's army in the battle of Hastings were Bretons who had fled from the Anglo-Saxon invaders of Britain some 400-500 year earlier. Were those Bretons aware of this fact? Or did they even chose to participate to have a revenge against the Anglo-Saxons?

by videki_man
serioussham

Do you mean Britons as in from the island of (Great) Britain, or Bretons from the now-French region of Brittany?