Henry V renewed England's claim to the French throne and began war with France in 1415, defeating the French army at Agincourt through superior weapons and tactics. By 1420, the Treaty of Troyes recognized Henry as heir to the French throne after he married Catherine of Valois. However, Henry V died in 1422, leaving the thrones of England and France to his infant son Henry VI. While John of Bedford helped expand English control as regent, French national pride swelled and the English army was eventually defeated, ending the Hundred Years War in 1453 with England losing all French territories except Calais.