he was accused of having ordered the assassination of John the Fearless. The legal basis for the treaty was from the beginning on questionably solid ground, as only the King himself would have the authority to make such an all-important decision as terminating his own Royal House, and Charles, called "the mad", was indisputably not of mental capacity to enter into such an agreement, as most of his entire reign was overseen by regents for that very reason (the four universal legal tenets for any valid contract being consideration, agreement, legality, and capacity). Despite this, due to the shifting military and political situation, the Dauphin Charles' disinheritance received further legal sanction after he declared himself regent for Charles VI in rivalry to the regency declared by Henry V. The Dauphin was summoned to a lit-de justice (legal hearing) in 1420 on charges of lèse-majesté. When he failed to appear, a Parisian court in 1421 found Charles the Dauphin guilty of treason and sentenced him to disinheritance and banishment from the Kingdom of France, losing all privileges to land and titles. Aftermath The treaty was undermined by the deaths of both Charles VI and Henry V within two months of each other in 1422. The infant Henry VI of England became King of both England and France, but the Dauphin Charles also claimed the throne of France upon the death of his father – though he ruled only a region of France centred on Bourges and was derisively referred to as the "King of Bourges" by his opponents. The terms of the Treaty of Troyes were later confirmed once again at the Treaty of Amiens (1423), when Burgundy and Brittany confirmed the recognition of Henry VI as King of France and agreed to form a triple-defensive alliance against the Dauphin Charles. The course of the war shifted dramatically in 1429, however, following the appearance of Joan of Arc to command the Valois forces. They lifted the siege of Orléans and then fought their way to Reims, traditional site of French coronations, where the former Dauphin was crowned as Charles VII of France. In 1435, Charles signed the Treaty of Arras with the Burgundians, in which they recognized and endorsed his claims to the throne. The military victory of Charles VII over Henry VI rendered the treaty moot. A final attempt at the French throne was made by Edward IV of England