 This was as a result of her father's moves to create alliances in support of his renewed claim to the French throne.Seven years previously, King Philip VI of France attempted to confiscate the Duchy of Guyenne (also referred to as Aquitaine) from Edward III – an event that traditionally marks the beginning of the Hundred Years' War – after which Edward used military force, diplomacy and marital links to strengthen his claim to the French throne.In the Duchy of Brittany succession dispute, he supported John of Montfort since a close alliance to the English crown with Brittany would give Edward access to the port of Brest for use by English troops.