De Brosse was among the French leaders who attempted to repel the English advance, however they failed, and in 1429 the English arrived at Orléans. Joan of Arc tried to get the king to send her, and with the urging of de Brosse, the king was convinced and sent Joan under the escort of de Brosse and Louis de Culant. The king also sent troops with them who joined the main French army. Under the leadership of Joan of Arc, the French won the Siege of Orleans. Because of his services, de Brosse was given a place of honor at the coronation of the king.