John of Gaunt III's rule was becoming unpopular due to high taxation and his affair with Alice Perrers, political opinion closely associated the Duke of Lancaster with the failing government of the 1370s. Furthermore, while King Edward and the Prince of Wales were popular heroes due to their successes on the battlefield, John of Gaunt had not won equivalent military renown that could have bolstered his reputation. Although he fought in the Battle of Nájera (1367), for example, his later military projects proved unsuccessful. When Edward III died in 1377 and John's ten-year-old nephew succeeded as Richard II of England, John's influence strengthened.
Monarchy of the United Kingdom John of Gaunt, Duke of Lancaster; hence, his dynasty was known as the House of Lancaster. For most of his reign, Henry IV was forced to fight off plots and rebellions; his success was partly due to the military skill of his son, the future Henry V. Henry V's own reign, which began in 1413, was largely free from domestic strife, leaving the king free to pursue the Hundred Years' War in France. Although he was victorious, his sudden death in 1422 left his infant son Henry VI on the throne and gave the French an opportunity to overthrow English