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
John of Gaunt in Jure uxoris by right of his second wife, Constance of Castile, whom he had married in 1371. However, crisis ensued almost immediately in his absence, and in 1387 King Richard's misrule brought England to the brink of civil war. Only John, on his return to England in 1389, succeeded in persuading the Lords Appellant and King Richard to compromise to usher in a period of relative stability. During the 1390s, John's reputation of devotion to the well-being of the kingdom was largely restored. During his second marriage, John of Gaunt had entered into an extra-marital love affair with Katherine