Louis XI (3 July 1423 – 30 August 1483), called the Prudent (French: le Prudent) and the Universal Spider (Middle French: l'universelle aragne) or the Spider King, was the King of France from 1461 to 1483. He was the son of Charles VII of France and Mary of Anjou, a member of the House of Valois, grandson of Charles VI and Isabeau of Bavaria and one of the most successful kings of France in terms of uniting the country. Meanwhile England was going through its own civil conflict known as the Wars of the Roses. Louis had an interest in this war since Charles the Bold was allied with the Yorkists who opposed King Henry VI. When the Earl of Warwick fell out with Edward IV, whom he had helped to the throne, Louis granted him refuge in France. He then encouraged Warwick to form an alliance with his bitter enemy Margaret of Anjou in order to restore her husband Henry VI to the throne. The plan worked and Edward was forced into exile, but he later returned and Warwick the Kingmaker was killed at the Battle of Barnet in 1471. King Henry was murdered soon afterwards. Now the undisputed master of England, Edward invaded France in 1475, but Louis was able to negotiate the Treaty of Picquigny by which the English army left France in return for a large sum of money. The English renounced their claim to French lands such as Normandy and the Hundred Years War could be said to be finally over. Louis bragged that although his father had driven the English out by force of arms, he'd driven them out by force of pâté, venison and good wine - albeit at the expense of a huge annual chunk of the kingdom's treasury.