Henry's crusade never departed, as he was forced to deal with problems in Gascony, where the harsh policies of his lieutenant, Simon de Montfort, had provoked a violent uprising in 1252, which was supported by King Alfonso X of neighbouring Castile. The English court was split over the problem: Simon and Eleanor argued that the Gascons were to blame for the crisis, while Henry, backed by the Lusignans, blamed Simon's misjudgment. Henry and Eleanor quarrelled over the issue and were not reconciled until the following year. Forced to intervene personally, Henry carried out an effective, if expensive, campaign with the help of the Lusignans and stabilised the province. Alfonso signed a treaty of alliance in 1254, and Gascony was given to Henry's son Edward, who married Alfonso's half-sister Eleanor, delivering a long-lasting peace with Castile.