War of the Reunions 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, from 1670, introduced several Chambers of Reunion to investigate whether France had been granted all the territory that 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
Hessian War Peace Congress mediated by Duke Ernest of Saxe-Gotha and which resulted in a unification and peace treaty that was sealed in April 1648, ahead of the Treaty of Westphalia itself. Before the Westphalian Peace Treaty, Cassel fought one last time against the imperial side, winning the Battle of Wevelinghoven in the Rhineland, together with other Protestant troops. Darmstadt, however, was not involved in this battle. Under the Unification Treaty between Cassel and Darmstadt, Upper Hesse was permanently divided. Darmstadt had to give up a significant part of Upper Hesse to Cassel, not least Marburg and other occupied territories, including the