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 was simply abandoned and the army returned ingloriously to England. John of Gaunt received most of the blame for the debâcle. Partly as a result of these failures, and those of other English commanders at this period, John was one of the first important figures in England to conclude that the war with France was unwinnable because of France's greater resources of wealth and manpower. He began to advocate peace negotiations; indeed, as early as 1373, during his great raid through France, he made contact with , brother and political adviser of Pope Gregory XI, to let the pope know