Like almost all villages in the Glan region, Heinzenhausen, too, suffered under the ravages of the 17th century's wars, both the Thirty Years' War and French King Louis XIV's wars of conquest. However, during the Thirty Years' War, the nearby residence town of Lauterecken afforded the villagers shelter, and it was never overrun by the French. Nevertheless, death reaped a rich harvest even here with hunger and the Plague. The County met its end in 1694, when Leopold Louis, Count Palatine of Veldenz died with no heir. Now came a dispute over whether the county – and thereby Heinzenhausen with it – should pass to the Electorate of the Palatinate or be returned to the County Palatine of Zweibrücken, which at that time was ruled by Swedish King Charles XI. Charles took ownership of the "Ämter" of Veldenz and Lauterecken along with the Remigiusberg, but in 1697, the Electorate of the Palatinate dispatched troops, and quickly took the "Amt" of Lauterecken. A permanent solution to the dispute came only in 1733, in Palatinate's favour, with the so-called Treaty of Succession. Johann Goswin Widder, in his 1788 work "Geographische Beschreibung der Kurpfalz" (“Geographical Description of Electoral Palatinate”), wrote about Heinzenhausen, among other things: “Heinzenhausen, a slight little village of 15 houses on the Lauter’s right bank, lying half an hour up from Lauterecke, was called long ago Heinzemanneshusen … Nevertheless, the village seems to have been subject, with the "Vogtei", at all times to the Counts of Veldenz and Castle Lauterecke.”