In 1346 Edward led an army across northern France, defeating the French at the Battle of Crécy and laying siege to the port of Calais. With French finances and morale low after Crécy, Philip failed to relieve the town and it surrendered on 3 August 1347. Following further inconclusive military manoeuvres by each side, and given that both sides were financially exhausted, emissaries despatched by Pope Clement VI found willing listeners. By 28 September the Truce of Calais, intended to bring a temporary halt to the fighting, had been agreed. This strongly favoured the English, confirming them in possession of all of their territorial conquests. It was to run for nine months to 7 July 1348, but was extended repeatedly over the years until it was formally set aside in 1355. The truce did not stop ongoing naval clashes between the two countries, nor small-scale fighting in Gascony and the Duchy of Brittany, nor occasional fighting on a larger scale. A treaty ending the war was negotiated at Guînes and signed on 6 April 1354. The French king, now John II, decided not to ratify it and it did not take effect. The latest extension to the truce was due to expire on 24 June. It was clear that from then both sides would be committed to full-scale war.