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
Edward III of England of the Household John Neville were dismissed from their positions. Edward's mistress, Alice Perrers, who was seen to hold far too much power over the ageing king, was banished from court. Yet the real adversary of the Commons, supported by powerful men such as Wykeham and Edmund de Mortimer, Earl of March, was John of Gaunt. Both the king and the Black Prince were by this time incapacitated by illness, leaving Gaunt in virtual control of government. Gaunt was forced to give in to the demands of parliament, but at its next convocation, in 1377, most of the achievements of