カスティヨンの戦い
The Treaty of Troyes was an agreement that King Henry V of England and his heirs would inherit the French throne upon the death of King Charles VI of France. It was formally signed in the French city of Troyes on 21 May 1420 in the aftermath of Henry's successful military campaign in France. It forms a part of the backdrop of the latter phase of the Hundred Years' War finally won by the French at the Battle of Castillon in 1453, and in which various English kings tried to establish their claims to the French throne.