This bunker is one of the largest artillery fortifications of the Maginot line. This defensive system along the French border to Belgium, Luxembourg, Germany and Italy was built between 1930 and 1940 to fight off attacks from the bordering countries. This facility went active in 1935 and involves nine combat blocks altogether with different kinds of guns. The garrison was composed of 782 soldiers including 26 officers.
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In the 1980s the French army modernized this artillery fortification and upgraded it to a hardened underground command post. During that process both main entrances were completely rebuilt: Massive concrete walls were supposed to protect the site from a nearby nuclear blast.
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