Fort de Roppe features a central main structure reinforced by two batteries and was one of the first forts built near the border. It was built between 1875 and 1877. It is located to the north of the Belfort stronghold at 511 metres above sea level, from where it kept watch over the roads and railways from Mulhouse and Giromagny. t also made it possible to keep the penetration line away from the border by preventing access to it. Fort Ney operated in conjunction with the Salbert and Giromagny forts to ensure the defence from the north of Belfort to the Vosges. t also linked its defence with that of Bessoncourt.

From 1893, the fort was linked to other forts around Belfort by a strategic railway. Between 1905 and 1910, the fort was modernised with the creation of a 646-man concrete barracks and the acquisition of counterscarp coffers to replace the caponiers. Today, this fortification still belongs to the military. Every year, Fort de Roppe opens its doors during the European Heritage Days.