The treaties ending the War of Devolution (the Treaty of Aix-la-Chapelle [1668]) and the Franco–Dutch War (the Treaty of Nijmegen [1678]), as well as the Treaty of Westphalia of 1648 (which ended the Thirty Years War), ceded a number of towns to France. By tradition, when a town changed hands so did the surrounding rural areas, which provided it with food and other such supplies. Often, the borders of these dependent regions were ill-defined. Thus Louis and his court, beginning in 1670, introduced several Chambers of Reunion that would investigate whether France had been granted all the territory it had been owed. The Chambers of Reunion, loyal to the king, ruled after a review of conflicting medieval documents that a number of outlying areas should be awarded to France. These territories