Edward and his forces reached Tournai on 23 July. Apart from the inhabitants, there was also a French garrison inside. The siege dragged on and Philip was drawing closer with an army, while Edward was running out of money. At the same time, Tournai was running out of food.
Edward's mother-in-law, Jeanne of Valois, then visited him in his tent on 22 September and begged for peace. She had already made the same plea in front of Philip, who was her brother. A truce (known as the Truce of Espléchin) could then be made without anyone losing face and Tournai was relieved.
The Siege of Tournai is notable for being an early example of the use of the cannon in European siege warfare