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. Terms The treaty arranged for the marriage of Charles VI's daughter Catherine of Valois to Henry V, who was made regent of France and acknowledged (along with his future sons) as successor to the French throne. The Dauphin Charles VII of France was disinherited from the succession. The Estates-General of France ratified the agreement later that year after Henry V entered Paris. Background The French king Charles VI suffered bouts of insanity through much of his reign. Henry V had invaded France in 1415 and delivered a crushing defeat to the French at Agincourt. In 1418, John the Fearless, Duke of Burgundy, whose political and economic interests favoured an agreement with the English, occupied Paris. One year later he was murdered by his Armagnac opponents during what he thought was a diplomatic meeting with the Dauphin Charles on the bridge at Montereau. His son Philip the Good formed an alliance with the English and negotiated the treaty with the English King. Isabeau of Bavaria, Charles VI's wife, whose participation in the negotiations was merely formal, agreed to the treaty disinheriting her son, hoping that if the dynasties were joined through Henry V the war could be ended and leave France in the hands of a vigorous and able king. There had been earlier rumours that the Queen had had an affair with her brother-in-law Louis, Duke of Orléans. These rumours were gladly taken up by Louis's main rival, John the Fearless, who had had the Duke of Orléans assassinated in 1407. The Burgundians promoted the rumour that Charles was a bastard. However, such a statement could not possibly be registered in a treaty without offending the honour of the King of France. Thus, the disinheritance of the dauphin, with respect to the French throne, was based on his crimes énormes (capital offences) as