In 1346 Edward led an army across northern France, storming and sacking the Norman town of Caen, defeating the French with great loss of life at the Battle of Crécy and laying siege to the port of Calais. With French finances and morale at a low ebb after Crécy, Philip failed to relieve the town and the starving defenders surrendered on 3 August 1347. With both sides financially exhausted, Pope Clement VI dispatched emissaries to negotiate a truce. On 28 September the Truce of Calais was agreed, bringing a temporary halt to the fighting. The agreement strongly favoured the English, confirming them in possession of all of their territorial conquests. It was agreed that it would expire nine months later on 7 July 1348 but was extended repeatedly over the years. The truce did not stop ongoing naval clashes between the two countries, nor small-scale fighting in Gascony and Brittany. In August 1350 John II succeeded his father, Philip, as King of France.