His reign began during the Thirty Years' War and during the Franco-Spanish war. His military architect, Vauban, became famous for his pentagonal fortresses, and Jean-Baptiste Colbert supported the royal spending as much as possible. French dominated League of the Rhine fought against the Ottoman Turks at the Battle of Saint Gotthard in 1664. The battle was won by the Christians, chiefly through the brave attack of 6,000 French troops led by La Feuillade and Coligny.