Guillaume). The gradual abandonment of the Basque-related Aquitanian language in favor of a local Vulgar Latin was not reversed. The replacing local Vulgar Latin evolved into Gascon. (for example, Latin f became h; cf. Latin , French , Spanish , Occitan , but Gascon ). Meanwhile, Viking raiders conquered several Gascon towns, among them Bayonne in 842–844. Their attacks in Gascony may have helped the political disintegration of the Duchy until their defeat against William II Sánchez of Gascony in 982. In turn, the weakened ethnic polity known as Duchy of Wasconia/Wascones, unable to get round the general spread of feudalization, gave way to a myriad of counties founded by Gascon lords. Angevin Empire The 1152 marriage of Henry II and Eleanor of Aquitaine allowed the former to gain control of his new wife's possessions of Aquitaine and Gascony. This addition to his already plentiful holdings made Henry the most powerful vassal in France. In 1248, Simon de Montfort was appointed Governor in the unsettled Duchy of Gascony. Bitter complaints were excited by de Montfort's rigour in suppressing the excesses of both the seigneurs of the nobility and the contending factions in the great communes. Henry III yielded to the outcry and instituted a formal inquiry into Simon's administration. Simon was formally acquitted of the charges, but in August 1252 he was nevertheless dismissed. Henry then himself went to Gascony, pursuing a policy of conciliation; he arranged the marriage between Edward, his 14-year-old son, and Eleanor of Castile, daughter of Alfonso X. Alfonso renounced all claims to Gascony and assisted the Plantagenets against rebels such as Gaston de Bearn, who had taken control of the Pyrenees. In December 1259, Louis IX of France ceded to Henry land north and east of Gascony. In return, Henry renounced his claim to many of the territories that had been lost by King John. In May 1286, King Edward I paid homage before the new king, Philip IV of France, for the lands in Gascony. However, in May 1294, Philip confiscated the lands. Between 1294 and 1298, Edward sent three expeditionary forces to recover Gascony, but Philip was able to retain most of the territory until the Treaty of Paris in 1303. In 1324 when Edward II of England, in his capacity as Duke of Aquitaine, failed to pay homage to the French king after a dispute, Charles IV declared the duchy forfeit at