sentences:  They, too, were vassals of the Waldgraves and they maintained a common administration and jurisdiction.In 1595, the whole "Eßweiler Tal" passed to the Duchy of Palatinate-Zweibrücken, to which Eßweiler belonged until 1797, when the lands on the Rhine’s left bank were overrun and conquered by Napoleon’s forces, while a few villages passed back to the Waldgraves in 1755.The wars of the 17th and 18th centuries wrought great destruction and losses to the population.