Lines of Lauterburg and Weissenburg

The Lines of Weissenburg, or Lines of Wissembourg, were entrenched works — an earthen rampart dotted with small outworks — along the river Lauter. They were built in 1706 and lasted into the 19th century.

The Lines were 12 miles (19 km) in length and stretched from Wissembourg on the west to Lauterbourg on the east, where they were anchored on the Rhine River. The French built this chain of fortifications during the War of the Spanish Succession under the orders of the Duke of Villars in 1706.

During the War of the Austrian Succession the loss of the Lines by the French played a pivotal role in the campaign of 1744. French King Louis XV, in command of an army of 90,000, captured Menen and Ypres and prepared to invade the Austrian Netherlands. He was forced to abandon his invasion plans when Prince Charles Alexander of Lorraine, assisted by the veteran Otto Traun, skillfully manoeuvred his army over the Rhine near Philippsburg on July 1, and captured the Lines of Wissembourg. This move cut off an army under Louis, Prince de Conti from Alsace. Although Conti managed to fight his way through the enemy at Wissembourg and posted himself near Strasbourg, Louis XV abandoned the invasion of the Southern Netherlands, and his army moved down to take a decisive part in the war in Alsace and Lorraine.

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Wikipedia