Treaties of Nijmegen
Cassel was the first and last time Orléans fought in the front-line, allegedly due to Louis' resentment of the attention and popularity he gained as a result. The 1678 Treaties of Nijmegen reset France's northern border, Spain ceding Saint-Omer, Cassel, Aire, Ypres, Cambrai, Valenciennes and Maubeuge. With the exception of Ypres, returned in 1697, this fixed the frontier close to where it remains today.