On May 24, 1430, Joan of Arc was captured. De Brosse tried to convince the king to save her without effect. He ruined himself trying to raise an army. He joined Xaintrailles and Lahire at the head of an army of 4,000. They liberated Compiegne, however Joan of Arc was no longer in the city. She had been moved to Rouen, where she was burned on May 30, 1431. De Brosse tried to avenge her by taking Rouen, however his plan failed, and he returned to Boussac.