Grand Est
In 1926, the French Ministry of Defense unveiled plans to fortify the country's eastern borders against possible surprise attacks, such as during the Franco-Prussian War in 1870.
Ouvrage du Four-à-Chaux
L'ouvrage du Four-à-Chaux was one of the gros ouvrages or large artillery works of the French Maginot Line. Yet almost nothing of it can be seen above ground.
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Hauts-de-France
At the foot of the French side of the Zwarteberg lies a series of bunkers from the Maginot Line, including this example from 1938.
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