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Origin and history

Fort du Cognelot, also known as Fort Vercingetorix, was built between 1874 and 1877 as part of the fortifications of eastern France, after the defeat of 1870. Located 470 metres above sea level on the Cognelot mountain, it was part of the Langres stronghold, 7.7 km southeast. Its role was to protect the Chalindrey railway node, a strategic point linking Dijon, Paris, Basel and Toul.

The fort was briefly renamed fort Vercingetorix in 1887 by Minister Georges Boulanger, in tribute to the Gauls chief, but regained his original name a few months later. Despite this, the inscription Vercingetorix remained engraved on his pediment. Unarmed in 1915 to send his guns to the front, in 1944 he suffered the destruction of his casemate by the Americans, testing explosives before the offensive against Germany.

Architecturally, the fort is distinguished by its bastioned envelope of 29 hectares, in the shape of irregular hexagon, and its isolated central reduced, a rare arrangement in the Séré de Rivières system. It consisted of three direct-fire casemates, counterscarp and escarp chests (instead of conventional capons), and a single optical communications station, connecting Besançon and Dijon by helicopter. An auxiliary battery, called the Pailly, completed the device.

Owned by the community of communes since 1995, the fort is now preserved by an association established in 2002. Ranked Historic Monument in 2011, it illustrates the defensive innovation of the late 19th century, mixing autonomy and interdependence with other Langres forts. His history also reflects the military upheavals, from the Revue to the Second World War.

The site still houses remarkable remains, such as concrete observatories, powder shops (planned for 180 tons), and a bronze orientation table, restored thanks to the association. Although some battled casemates had never been installed, its structure remains an intact testimony of post-1870 fortification strategies.

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