John of Gaunt of Castile. As his father and elder brother, Edward, the Black Prince, became incapacitated due to poor health, Gaunt assumed control of many government functions, and rose to become one of the most powerful political figures in England. He was faced with military difficulties abroad and political divisions at home, and disagreements as to how to deal with these crises led to tensions between Gaunt, the English Parliament, and the ruling class, making him an extremely unpopular figure for a time. John exercised great influence over the English throne during the minority of King Richard II, and the ensuing periods
Richard II of England with this setback on the continent, Richard turned his attention instead towards France's ally, Scotland. In 1385, the king himself led a punitive expedition to the north, but the effort came to nothing, and the army had to return without ever engaging the Scots in battle. Meanwhile, only an uprising in Ghent prevented a French invasion of southern England. The relationship between Richard and his uncle John of Gaunt deteriorated further with military failure, and John of Gaunt left England to pursue his claim to the throne of Castile in 1386 amid rumours of a plot against his person. With