against the Turks, although the Western Schism had split the papacy in two, with rival popes at Avignon and Rome, and the days when a pope had the authority to call a crusade were long past. The two decisive factors in the formation of the last crusade were the ongoing Hundred Years' War between Richard II's England and Charles VI's France and the support of Philip II, Duke of Burgundy. In 1389, the war had ground to one of its periodic truces. Further, in March 1395, Richard II proposed a marriage between himself and Charles VI's daughter Isabella in the interests of peace and the two kings met in October 1396 on the borders of Calais to agree to the union and agree to lengthen the Truce of Leulinghem. The support of Burgundy, among the most powerful of the French nobles, was also vital. In 1391, Burgundy, trying to decide between sending a crusade to either Prussia or Hungary, sent his envoy Guy de La Trémoille to Venice and Hungary to evaluate the situation. Burgundy originally envisioned a crusade led by himself and the Dukes of Orléans and Lancaster, though none would join the eventual crusade. It was very unlikely that defense against the Turks was considered a particularly important goal of the crusade. Burgundy's interest in sponsoring the crusade was in increasing his and his house's prestige and power and, historian Barbara Tuchman notes, "since he was the prince of self-magnification, the result was that opulent display became the dominant theme; plans, logistics, intelligence about the enemy came second, if at all." In 1394, Burgundy extracted 120,000 livres from Flanders, sufficient to begin preparations for a crusade, and in January 1395 sent word to King Sigismund of Hungary that an official request to the King of France would be accepted. In August, Sigismund's delegation of four knights and a bishop arrived in the court of Paris to paint a description of how "40,000" Turks were despoiling and imperiling Christian lands and beg, on Sigismund of Hungary's behalf, for help. Charles VI, having secured a peace with England through the marriage of his daughter, was able to reply that it was his responsibility to protect Christianity and punish Sultan Bayezid. French nobility responded enthusiastically to the declaration; Philip of Artois, Count of Eu, the Constable of France, and Jean Le Maingre, the Marshal of France, declared participation in the crusade