Henry V of England take a wider share in politics. From January 1410, helped by his uncles Henry Beaufort and Thomas Beaufort, legitimised sons of John of Gaunt, he had practical control of the government. Both in foreign and domestic policy he differed from the king, who discharged the prince from the council in November 1411. The quarrel of father and son was political only, though it is probable that the Beauforts had discussed the abdication of Henry IV. Their opponents certainly endeavoured to defame the prince. It may be that the tradition of Henry's riotous youth, immortalised by Shakespeare, is partly due to
John IV, Duke of Brittany all of John's children. After his death, she served as Regent to their son, John V, Duke of Brittany, and eventually married King Henry IV of England. John IV, Duke of Brittany John IV the Conqueror KG (in Breton Yann IV, in French Jean IV, and traditionally in English sources both John of Montfort and John V) (1339 – 1 November 1399) was Duke of Brittany and Count of Montfort from 1345 until his death and 7th Earl of Richmond from 1372 until his death. He was the son of John of Montfort and Joanna of Flanders. His father claimed