Reigned 508–533.

When the Romans left Britain, A.D. 409, the country split up into principalities and petty kingdoms, under chiefs. Vortigern brought in the Saxons to help him reign, and they took possession of most of southern England. King Arthur is said to have stemmed the invasion and conquered them in twelve pitched battles, and to have formed a league of chiefs reaching from Somersetshire to the Frith of Forth. Beautiful legends have been written about this league and the chiefs who joined in it. Arthur’s reign lasted twenty-five years.