Right up until the French Revolution, the division of power did not change in principle. Börsborn lay in the Münchweiler Tal over which the lordship of the House of Leyen, although as a matter of principle there were good links between Zweibrücken and the Counts of Leyen. The events of the Thirty Years' War and the Plague took a heavy toll on the village. A few years after the war, the House of Leyen began to expand its holdings on the Blies, the Saar and the Glan. The villages in the Münchweiler Tal within these scattered holdings were gathered together into an "Unteramt" of the whole lordship. Only in 1773 did the comital couple, Franz Karl von der Leyen and Marianne, "née" Dalberg, move their residence from Koblenz to Blieskastel. After Count Franz Karl's death in 1775, his beloved wife Marianne took over the regency for their not yet grown son Philipp. In 1787 and 1788, she had the striking belltowers in Börsborn and Steinbach am Glan built, now said to be village landmarks. The countess managed to flee during the occupation of Blieskastel by French Revolutionary troops and sought refuge first in Koblenz with the local people's support, and later in Frankfurt. Under Emperor Napoleon’s rule, the House of Leyen got its personal property back. Under French rule after 1801, Börsborn lay in the Department of Sarre, whose seat was at Trier, in the Arrondissement of Saarbrücken, in the Canton of Waldmohr and in the "Mairie" (“Mayoralty”) of Glan-Münchweiler.