Ouvrage Hackenberg, one of the largest (a gros ouvrage) of the Maginot Line fortifications, is part of the Fortified Sector of Boulay. It is situated twenty kilometres east of Thionville, in the Moselle département, near the village of Veckring, on the Hackenberg (343 metres). It is located between gros ouvrage Billig and petit ouvrage Coucou, facing Germany. The fort occupies the wooded Hackenberg ridge. Before World War II it was considered a showpiece of French fortification technology, and was visited by British King George VI.
