At this time, Alain hoped to consolidate his power by taking control of the
Duchy of Brittany by marriage to
Anne of Brittany, the daughter and heir of Duke
Francis II. He entered into rebellion against the royal authority in support of the duchy, during the so-called
Mad War. His intrigues were unsuccessful and he was defeated, having been unable to provide support to the duke in 1487. The following year, he brought reinforcements by sea, but was defeated by
Louis II de la Trémoille at the
Battle of Saint-Aubin-du-Cormier. He continued, however, to claim the legacy of Francis II, occupying Nantes with his Gascon troops. He still hoped to marry Anne and inherit the duchy but found it expedient to deliver
Nantes to the royal army in exchange for an agreement that the French would support his claim to Anne's hand. Anne had no intention of marrying Alain. Instead, she married the French king, putting an end of Alain's dynastic ambition in Brittany. ==Family==