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 Mercia, fighting Norman forces based in Hereford. These events forced William to return to England at the end of 1067. In 1068 William besieged rebels in Exeter, including Harold's mother Gytha, and after suffering heavy losses managed to negotiate the town's surrender. In May, William's wife Matilda was crowned queen at Westminster, an important symbol of William's growing international stature. Later in the year Edwin and Morcar raised a revolt in Mercia with Welsh assistance, while Gospatric, the newly appointed Earl of Northumbria, led a rising in Northumbria, which had not yet been occupied by the Normans. These rebellions rapidly