Camelot. Excalibur. The Knights of the Round Table. The Holy Grail. The legend of King Arthur conjures up romantic images of chivalry and adventure. This fable has grown over the centuries and has thrilled millions throughout the world. But is it all myth? Many historians believe that the character of King Arthur is based on not one, but two men: the son of a high-ranking Roman ruler and a 5th-century fighter, who defended Britain against Saxon invaders. Painstaking research details how these two war heroes may have helped create an icon.