Ouvrage Bersillies is a petit ouvrage of the Maginot Line, built as part of the `New Fronts` program to address shortcomings in the Line`s coverage of the border with Belgium. Like the other three ouvrages near Maubeuge, it is built on an old Séré de Rivières system fortification, near the town of Bersillies. The preserved Ouvrage La Salmagn......