In the spring of 1488 the power of the house of Beaujeu was increased by the death of the Duke of Bourbon, to whose duchy Anne's husband was heir. Nevertheless, fortune was not favoring Anne in all things; for the Breton nobles, having repented of their rebellion against their own duke, and beginning to suspect that Madame Anne meant to keep her troops in Brittany, now changed sides, and expelled the French garrisons from some of the towns. In retaliation, Anne's general, Louis de La Trémoille, began a vigorous campaign in Brittany early in April, which culminated in the decisive victory of Saint-Aubin-du-Cormier (July 27th). The Breton army was completely routed, and the rebel nobles, including Louis d' Orléans and the Prince of Orange, fell into the power of Anne. Louis, her most dangerous enemy, was confined in the tower of Bourges, where he might meditate, without endangering the public peace, upon the injustice of allowing a woman to govern France. Within a month after the battle, Francois II., humbly suing for peace to his "sovereign" Charles VIII., signed a treaty in which he promised to exclude from his court and dukedom the enemies of France, and to negotiate no marriage for his daughters without the advice and consent of Charles. In the name of Charles, as usual, all this was done; but it was really a signal triumph for Anne de Beaujeu. The pride of her Breton adversary was broken, and he did not long survive the treaty; some have declared that he died of chagrin at being no longer able to betroth his daughters first to one suitor and then to another. Whether of chagrin or of some more ordinary complaint, he died in September, 1488, and it then developed that his eldest daughter, Anne, a girl of not quite twelve, had indeed been promised to three parties simultaneously. Out of the confused situation in Brittany it was Madame de Beaujeu's task to make profit for France. The eldest daughter and heiress of the late duke, Anne de Bretagne, was enjoined by the royal council from assuming her title of duchess until authorized to do so by the king, who claimed not only the feudal wardship of the heiress of Brittany, but her very coronet itself, under the terms of a treaty between the Crown and certain of the great barons of Brittany, including Marshal de Rieux, then guardian of Anne de Bretagne. This treaty, dating from 1484, had recognized the claims of the king as superior to those of the female heirs in Brittany, as in other fiefs where the court was endeavoring to enforce the _Loi Salique_. But Marshal de Rieux and his friends had now changed their views, seeing that the pretensions of the crown would result in the extinction of Brittany as a distinct and independent province; they preferred governing the province through the young duchess to being governed by Madame la Grande.