In the spring Charles raised two large armies for the invasion of Aquitaine; one, under the Louis I, Duke of Anjou, was to enter Guyenne by La Reole and Bergerac, the other, under the John, Duke of Berry, was to march towards Limousin and Quercy, and both were to unite and besiege the prince in Angoulême. Ill as he was, the prince left his bed of sickness, and gathered an army at Cognac, where he was joined by the Barons of Poitou and Saintonge, and the Earls of Cambridge, Lancaster, and Pembroke. The two French armies gained many cities, united and laid siege to Limoges, which was treacherously surrendered to them by the bishop, Jean de Murat de Cros, who had been one of the prince's trusted friends.