The next attack came in 1345, when the Earl of Derby overran the Agenais (lost twenty years before in the War of Saint-Sardos) and took Angoulême, while the forces in Brittany under Sir Thomas Dagworth also made gains. The French responded in the spring of 1346 with a massive counter-attack against Aquitaine, where an army under John, Duke of Normandy, besieged Derby at Aiguillon. On the advice of Godfrey Harcourt (like Robert III of Artois, a banished French nobleman), Edward sailed for Normandy instead of Aquitaine. As Harcourt predicted, the Normans were ill-prepared for war, and many of the fighting men were at Aiguillon. Edward sacked and burned the country as he went, taking Caen and advancing as far as Poissy and then retreating before the army Philip had hastily assembled at Paris. Slipping across the Somme, Edward drew up to give battle at Crécy.