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.
John of Gaunt at Richard's behest. It may be that he felt he had to maintain this posture of loyalty to protect his son Henry Bolingbroke (the future Henry IV), who had also been one of the Lords Appellant, from Richard's wrath; but in 1398 Richard had Bolingbroke exiled, and on John of Gaunt's death the next year he disinherited Bolingbroke completely, seizing John's vast estates for the Crown. John of Gaunt was a patron and close friend of the poet Geoffrey Chaucer, most famously known for his work "The Canterbury Tales". Near the end of their lives, Lancaster and Chaucer became brothers-in-law.