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
John of Gaunt of political strife. He mediated between the king and a group of rebellious nobles, which included Gaunt's own son and heir, Henry Bolingbroke. Following Gaunt's death in 1399, his estates and titles were declared forfeit to the crown, and his son, now disinherited, was branded a traitor and exiled. Henry Bolingbroke returned from exile shortly after to reclaim his inheritance, and deposed Richard. He reigned as King Henry IV of England (1399–1413), the first of the descendants of John of Gaunt to hold the English throne. The House of Lancaster would rule England from 1399 until the time of the