During the French Revolutionary Wars, on 13 July 1794, the Vosges were the scene of the Battle of Trippstadt. From 1871 to 1918, they formed the main border line between France and the German Empire. The demarcation line stretched from the Ballon d'Alsace in the south to Mont Donon in the north with the lands east of it being incorporated into Germany as part of Alsace-Lorraine.