In 1666, in the greatest secrecy, Louis XIV prepared new conquests by making plans of the Spanish fortifications, and then began the War of Devolution. The Treaty of Aix-la-Chapelle from 1668 allowed the Kingdom of France to obtain a large number of strongholds, but Cambrai was not a part of them, nor were Bouchain, Valenciennes or Condé-sur-l'Escaut.