Ouvrage Michelsberg

Ouvrage Michelsberg, one of the Maginot Line fortifications, formed part of the Fortified Sector of Boulay as well as the fortified region of Metz. The ouvrage is located in Moselle between the towns of Dalstein and d'Ebersviller, about 23 km from Thionville. It is located between gros ouvrage Mont des Welches and petit ouvrage Hobling, facing Germany. Michelsberg did not see significant action in the Battle of France until June 1940, when it was attacked from the rear by German forces that had bypassed the Maginot Line. It successfully resisted these attacks, but was compelled to surrender in accordance with the 25 June 1940 armistice. After the Second World War it was renovated as a Cold War fortification against a potential Soviet invasion, then abandoned. It is now operated as a museum, and may be visited.

Source: Wikipedia