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,
The History of the Norman Conquest of England its influence has nevertheless been profound, many Anglo-Norman historians of modern times having come around to some of Freeman's main conclusions. Freeman first wrote about the Conquest while he was still a student at Oxford, where his 1846 essay "The Effects of the Conquest of England by the Normans" was submitted for, but failed to win, a prize. In 1859 and 1865 he published lengthy reviews of the last two volumes of Sir Francis Palgrave's "History of Normandy and of England". Exploring his points of agreement and disagreement with Palgrave Freeman decided to embark on his own history of the