Henry Ier Beauclerc, King of England and Duke of Normandy, tries to submit his barons in rebellion against his authority and to establish his power on the "Steps" of his Duchy. Its powerful neighbor, the King of France Louis VI the Fat, is also trying to expand his tiny royal domain in Ile de France. At the still imprecise limits of the two principalities, the Vexin and the valley of the Seine are the object of everyone's desire. In 1119, the two princes and their armies found themselves, almost by chance, face to face in Brémule.