expense of Jews. Ninety-nine Jews were burned alive in Brie-Comte-Robert. In 1198 Philip allowed Jews to return. Wars with his vassals In 1181, a conflict arose between Philip and Count Philip I of Flanders over the Vermandois, which King Philip claimed as his wife's dowry. Finally the Count of Flanders invaded France, ravaging the whole district between the Somme and the Oise before penetrating as far as Dammartin. Notified of Philip's approach with 2,000 knights, he headed back to Flanders. Philip chased him, and the two armies confronted each other near Amiens. By this stage, Philip had managed to counter the ambitions of the count by breaking his alliances with Duke Henry I of Brabant and the Archbishop of Cologne, Philipp von Heinsberg. This, together with an uncertain outcome were he to engage the French in battle, forced the Count to conclude a peace. In July 1185, the Treaty of Boves left the disputed territory partitioned, with Amiénois, Artois, and numerous other places passing to the king, and the remainder, with the county of Vermandois proper, left provisionally to the Count of Flanders. It was during this time that Philip II was nicknamed "Augustus" by the monk Rigord for augmenting French lands. Meanwhile, in 1184, Stephen I, Count of Sancerre and his Brabançon mercenaries ravaged the Orléanais. Philip defeated him with the aid of the Confrères de la Paix. War with Henry II A disagreement arose between Philip and King Henry II of England, who was also Count of Anjou and Duke of Normandy and Aquitaine in France. The death of Henry's eldest son, Henry the Young King, in June 1183, began a dispute over the dowry of Philip's widowed sister Margaret. Philip insisted that the dowry should be returned to France as the marriage did not produce any children, per the betrothal agreement. The two kings would hold conferences at the foot of an elm tree near Gisors, which was so positioned that it would overshadow each monarch's territory, but to no avail. Philip pushed the case further when King Béla III of Hungary asked for the widow's hand in marriage, and thus her dowry had to be returned, to which Henry finally agreed. The death of Henry's fourth son, Geoffrey II, Duke of Brittany, began a new round of disputes, as Henry insisted that he retain the guardianship of the duchy for his unborn grandson Arthur I, Duke