John of Gaunt return for a large annual payment and the marriage of their daughter Catherine to John of Trastámara's son Henry. John left Portugal for Aquitaine, and he remained in that province until he returned to England in November 1389. This effectively kept him off the scene while England endured the major political crisis of the conflict between Richard II and the Lords Appellant, who were led by John of Gaunt's younger brother Thomas of Woodstock, Duke of Gloucester. Only four months after his return to England, in March 1390, Richard II formally invested Gaunt with the Duchy of Aquitaine, thus providing
Kingdom of Navarre the Catholic as a bride. However, another claimant to the throne was stubbornly trying to stop her, John of Foix, Viscount of Narbonne, brother-in-law of future king of Louis XII of France. Invoking the French Salic Law, he called himself King of Navarre and sent diplomats to Ferdinand II. Pressure built on Catherine's regent Magdalena of Valois who, intent on saving their French possessions, eventually decided to marry the young Queen to the 7-year-old John of Albret, despite the Parliament of Navarre's preference for John of Aragon, son of Ferdinand and Isabella. The Beaumont party rose up, while the Agramonts