The Siege of Château Gaillard ends in a French victory over King John of England, who loses control of Normandy to King Philip II Augustus.
The siege of Château Gaillard was a part of Philip II's campaign to conquer John, King of England's continental properties. The French king besieged Château Gaillard, a Norman fortress, for six months. The Anglo-Normans were beaten in the battle and the consequence was the fall of Normandy.