Stephen, King of England recognised Stephen's son Eustace as Duke of Normandy in exchange for Eustace giving fealty to the French king. Stephen was less successful, however, in regaining the Argentan province along the Normandy and Anjou border, which Geoffrey had taken at the end of 1135. Stephen formed an army to retake it, but the frictions between his Flemish mercenary forces led by William of Ypres and the local Norman barons resulted in a battle between the two halves of his army. The Norman forces then deserted the King, forcing Stephen to give up his campaign. Stephen agreed to another truce with Geoffrey,
Norman conquest of England home. William did not return to England until later in 1075, to deal with the Danish threat and the aftermath of the rebellion, celebrating Christmas at Winchester. Roger and Waltheof were kept in prison, where Waltheof was executed in May 1076. By that time William had returned to the continent, where Ralph was continuing the rebellion from Brittany. Once England had been conquered, the Normans faced many challenges in maintaining control. They were few in number compared to the native English population; including those from other parts of France, historians estimate the number of Norman landholders at around 8000. William's