The Fort de Bourlémont, or Fort Choiseul, was built between 1878 and 1881. The fort was built as part of the Séré de Rivières system of fortifications, which were conceived in response to the increasing power and range of artillery. The Fort de Bourlémont was part of the defenses of the Charmes Gap , in the town of Mont-lès-Neufchâteau, 3 kilometres west of Neufchâteau.
The diamond-shaped fort was entered over a drawbridge through an off-center gate complex, directly adjacent to one of the caponiers that defend the fort's ditch. The for has a double caponier at the diamond's apex, with single caponiers, including the entrance caponier, and opposite corners. The artillery batteries are disposed in a rough circle surrounding the central barracks. The firing positions are shielded by earth mounds, while the entire surface of the fort incorporates earth protection against shellfire. The fort is unique in possessing, from its construction, a dedicated infirmary. Built of earth-shielded masonry, the fort could resist attacks by black powder-filled artillery shells. With the development of high explosive-filled shells, the so-called crise des obus torpilles , the fort was obsolete without further reinforcement with concrete. The Fort de Bourlémont never received such an upgrade.
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