Duke of Aquitaine to the Crown. Regardless, due to Henry Bolingbroke's seizure of the crown, he still came into possession of the dukedom. Henry V continued to rule over Aquitaine as King of England and Lord of Aquitaine. He invaded France and emerged victorious at the siege of Harfleur and the Battle of 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
English claims to the French throne female inheritance finally had to be introduced. On the death of Philip IV the Fair's son Louis X in 1316, immediately followed by that of his son John I the Posthumous, it had to be decided whether his young daughter Joan or his brother Philip would succeed to the throne. Philip arranged for his coronation, and became Philip V of France. He was challenged by the supporters of the Princess Joan, daughter of Louis X, on the basis of his right to the throne. In response, he convened an assembly of prelates, barons, and burgesses at Paris, who acknowledged him