Was Ambrosius Aurelianus the Real King Arthur?

 From The Collector:

In summary, Ambrosius Aurelianus was a historical leader of the Britons in fifth-century Britain, during a time of intense turmoil. He helped the Britons to recover from the devastating attacks of the Saxons and prevented them from being completely overwhelmed. From Gildas, we know that he was the son of prominent parents, although we do not know exactly what position they had. Based on the information from Bede and the Historia Brittonum, we can conclude that Ambrosius was likely born in about 420. The main part of his career, in which he campaigned against the Saxons, occurred somewhere between c. 475 and 491. Some scholars try to argue that he was the real King Arthur. This is based on the perceived implication by Gildas that Ambrosius was the victor at Badon. However, this is a very shaky foundation on which to base a theory. The dating of the Battle of Badon by other records places it well into the sixth century, which would make it impossible for Ambrosius to have been the leader. This argues strongly against identifying him as the real King Arthur. (Read more.)