Fulk V the Young (14 April 11091129) succeeded to the countship of Maine on the death of Elias (11 July 1110); but this increase of Angevin territory came into such direct collision with the interests of Henry I of England, who was also duke of Normandy, that a struggle between the two powers became inevitable. In 1112 it broke out, and Fulk, being unable to prevent Henry I from taking Alençon and making Robert, lord of Bellême, prisoner, was forced, at the treaty of Pierre Pecoulée, near Alençon (23 February 1113), to do homage to Henry for Maine. In revenge for this, while Louis VI was overrunning the Vexin in 1118, he routed Henry's army at Alençon (November), and in May 1119 Henry demanded a peace, which was sealed in June by the marriage of his eldest son, William the Aetheling, with Matilda, Fulk's daughter. William the Aetheling having perished in the wreck of the "White Ship" (25 November 1120), Fulk, on his return from a pilgrimage to the Holy Land (1120–1121), married his second daughter Sibyl, at the instigation of Louis VI, to William Clito, son of Robert Curthose, and a claimant to the duchy of Normandy, giving her Maine for a dowry (1122 or 1123). Henry I managed to have the marriage annulled, on the plea of kinship between the parties (1123 or 1124). But in 1127 a new alliance was made, and on 22 May at Rouen, Henry I betrothed his daughter Matilda, widow of the emperor Henry V, to Geoffrey the Handsome, son of Fulk, the marriage being celebrated at Le Mans on 2 June 1129. Shortly after, on the invitation of Baldwin II of Jerusalem, Fulk departed to the Holy Land for good, married Melisinda, Baldwin's daughter and heiress, and succeeded to the throne of Jerusalem (14 September 1131). His eldest son, Geoffrey V the Handsome or "Plantagenet", succeeded him as count of Anjou (11297 September 1151).