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.
Alice Perrers ‘maintenance’, the offence of interfering in the due process of the law. A contemporary description of the ordinance is as follows: Because a complaint was made to the king that some women have pursued various business and disputes in the king's courts by way of maintenance, bribing and influencing the parties, which thing displeases the king; the king forbids any woman to do it, and especially Alice Perrers, on penalty of whatever the said Alice can forfeit and of being banished from the realm. She was ultimately tried for corruption and subsequently banished from the kingdom by the Good Parliament,