. . . "Arthur Duke of Brittany was the rightful heir but Grandmother Eleanor of Aquitaine knew that Arthur, who was practically raised in Phillip II of France's influence would have been a French dupe In an irony, this and John's betrayal of his French Vassals (his second queen was taken from her betrothal into the powerful - Lusignan family) that led him to being wiped out in France except for Calais" .