From the outset, Geoffrey Plantagenet tried to profit by his marriage and, after the death of his father-in-law Henry I (1 December 1135), laid the foundation of the conquest of Normandy by a series of campaigns: about the end of 1135 or the beginning of 1136, he entered that country and rejoined his wife, the Empress Matilda, who had received the submission of Argentan, Domfront and Exmes. Having been abruptly recalled into Anjou by a revolt of his barons, he returned to the charge in September 1136 with a strong army, including in its ranks William, duke of Aquitaine, , and William Talvas, count of Ponthieu. After a few successes he was wounded in the foot at the Siege of Le Sap (1 October) and had to fall back.