The Battle of the Col de Panissars was fought on 30 September and 1 October 1285 between the forces of Philip III of France and Peter III of Aragon. It was a severe defeat for the French, who were already retiring over the Pyrenees when the Aragonese fell on them. It was the last battle of the Aragonese Crusade, a papally-sanctioned war on behalf of Charles of Valois to secure the Aragonese throne from the excommunicated king Peter III, who had conquered Sicily against papal interests. The battle followed on the heels of the naval victory at Les Formigues on 4 September.