The Chambers of Reunion (Chambres des Réunions) were French courts established by King Louis XIV in the early 1680s.
The courts' job was to determine what dependencies, if any, had belonged to the areas incorporated into France by these treaties.
Louis based his claims on ancient, often long-forgotten, rights to the dependent territories stemming from the Middle Ages.
The conflicts caused by the Reunion policy ultimately led to the Truce of Ratisbon in which Louis was allowed to keep most gains, partly because of the distraction of other countries and partly by bribes, including payoffs to the German princes and Charles II of England.
The war ended in 1697 with the signing of the Treaty of Ryswick in which Louis agreed to restore much of the territory that had been "reunited" with France as a result of the Chambers of Reunion.