 Complete the following phrase:  However, the kings of England remained dukes of Aquitaine. When Philip IV died, his nephew, Philip I count of Valois mounted the throne of France in the end, as Philip VI. Philip IV had married Jean of Champagne, who brought Champagne with her into the royal domain 1284. They had two sons but a new series of conflicts, known as the Hundred Years War, was provoked by the claim of Edward III of England, grandson of Philip IV through Edwards mother. Edwards aim was to supplant Philip VI. French armies suffered heavy defeats at Crécy 1346 and Poitiers 1356. Later, a third serious defeat was suffered at 