Following the defeat of France in the Franco-Prussian War of 1870-71 and the absorption of the provinces of Alsace and Lorraine into the newly formed German Empire, the German Army decided to construct a fortress line from Strasbourg to Luxembourg to protect their new territory and counter the great fortress system that was being built from Switzerland to Belgium, the centerpiece of which was the great Moselstellung (Moselle Position) of Metz/Thionville...
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