The
dual monarchy of England and France existed during the latter phase of the
Hundred Years' War when
Charles VII of France and
Henry VI of England disputed the succession to the throne of France. It commenced on 21 October 1422 upon the death of King
Charles VI of France, who had signed the
Treaty of Troyes which gave the French crown to his son-in-law
Henry V of England and Henry's heirs. It excluded King Charles's son, the
Dauphin Charles, who by right of
primogeniture was the heir to the
Kingdom of France. Although the Treaty was ratified by the
Estates-General of France, the act was a contravention of the French law of succession which decreed that the French crown could not be alienated. Henry VI, son of Henry V, became king of both England and France and was recognized only by the English and Burgundians until 1435 as King Henry II of France. He was crowned King of France on 16 December 1431.