The Dauphin was virtually powerless, but he and Charles were still in negotiations when news reached them that Edward III and John II had reached a peace agreement at Windsor. Knowing this could only be to his disadvantage, Charles had all the prisons in Paris opened to create anarchy and left Paris to build up his strength in Normandy. In his absence the Dauphin tried to assemble a military force of his own, but Charles meanwhile gave his executed followers a solemn state funeral in Rouen Cathedral on 10 January 1358 and effectively declared civil war, leading a combined Anglo-Navarrese force against the Dauphin's garrisons.