Duchy of Aquitaine Agincourt in 1415. He succeeded in obtaining the French crown for his family by the Treaty of Troyes in 1420. Henry V died in 1422, when his son Henry VI inherited the French throne at the age of less than a year; his reign saw the gradual loss of English control of France. The Valois kings of France, claiming supremacy over Aquitaine, granted the title of duke to their heirs, the Dauphins, during 1345 and 1415: John II (1345–50), Charles VII (1392?–1401), and Louis (1401–15). French victory was complete with the Battle of Castillon of 1453. England and France nominally
English claims to the French throne on 21 September 1792 and replaced it with the French First Republic. During the peace negotiations at the Conference of Lille, lasting from July to November 1797, the French delegates demanded that the King of Great Britain abandon the title of King of France as a condition of peace. In 1800, the Act of Union joined the Kingdom of Great Britain with the Kingdom of Ireland to a new United Kingdom of Great Britain and Ireland. George III chose this opportunity to drop his claim to the now defunct French throne, whereupon the fleurs de lis, part of the coat