Ouvrage Mauvais-Bois is a petit ouvrage of the Fortified Sector of the Crusnes on the Maginot Line. It is located between the gros ouvrage Latiremont and the petit ouvrage Bois-du-Four, facing the Belgium/Luxembourg border. The original plan for the position was for two phases of construction, resulting in a gros ouvrage provided with heavy artillery. The increase in tension between France and Germany in the late 1930s caused resources to be diverted elsewhere, and only the first three combat blocks were built. In 1940 the ouvrage was regularly bombarded, but not directly attacked by German infantry. When the French military divested itself of the majority of the Maginot fortifications, Mauvais-Bois was the second to be sold.
Ouvrage Sapey is a work of the Maginot Line's Alpine extension, the Alpine Line, also known as the Little Maginot Line. The ouvrage consists of one entry block, three artillery blocks and one observation block two kilometers west of Modane. The ouvrage was built beneath the older Fort du Sapey. The new work cost 12.8 million francs.
Ouvrage Saint-Gobain is a work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one entry block, one infantry block, one artillery block, one observation block and one combination block. Located in Modane, France, it is just across the valley of the Arc from Ouvrage Saint-Antoine and somewhat to the east of Ouvrage Sapey.
Ouvrage Saint-Antoine is a work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one entry block, one infantry block and one artillery block overlooking Modane on the way to the Col du Mont Cenis. Ouvrage Saint-Gobain is just to the north, across the mountain valley. Saint-Antoine overlooks the approaches to the Fréjus Rail Tunnel and was part of an ensemble of forts, including Saint-Gobain, Ouvrage Sapey and Fort du Replaton that guarded the French end of the tunnel and the descent from the Mont Cenis pass.
Ouvrage Pas du Roc is a work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one entry blocks, one infantry block, two artillery blocks and one observation block 6 kilometres (3.7 mi) south of Modane and 1.6 kilometres (0.99 mi) east of Ouvrage Le Lavoir in the vicinity of the Col de Fréjus. The position was incomplete at the outbreak of war in 1940.
Ouvrage Col du Granon is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one entry block, one infantry block and one observation block covering the Col du Granon as part of the defenses of Briançon and Grenoble. The ouvrage lies at an altitude of 2,329 metres (7,641 ft).
Ouvrage Saint Ours Haut is a work of the Maginot Line's Alpine extension, the Alpine Line, also known as the Little Maginot Line. The ouvrage consists of one infantry block, one artillery block, two observation blocks and one combination block in the vicinity of the Col de Larche. It is located on the territory of the commune of Meyronnes. Construction began in March 1931, at a cost of 15.1 million francs.
Ouvrage Restefond is a work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one artillery block and three observation blocks at the summit of the Col de la Bonette. The entry block and an artillery block were not completed, and a further block was never built. At 2,733 metres (8,967 ft), Restefond is the highest Maginot ouvrage.
Ouvrage Rimplas is a work of the Maginot Line's Alpine extension, the Alpine Line, known also as the Little Maginot Line. The ouvrage consists of one entry block, two infantry blocks and three artillery blocks at an altitude of 986 metres (3,235 ft). It was the first ouvrage of any portion of the Maginot Line to be completed, in 1928. The ouvrage features an aerial tram entrance.
Ouvrage Col du Caire Gros is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of two entry blocks at an altitude of 2,048 metres (6,719 ft). Additional blocks were planned but not built.
Ouvrage Gordolon is a work of the Maginot Line's Alpine extension, the Alpine Line, also known as the Little Maginot Line. The ouvrage consists of one and two infantry blocks at an altitude of 728 metres (2,388 ft). Gordolon was built by Borie contractors at a cost of 21.4 million francs. Work started in November 1931 and was completed in April 1934.
Ouvrage Flaut is a work of the Maginot Line's Alpine extension, the Alpine Line, also called the Little Maginot Line. The ouvrage consists of one entry block, one infantry block and one artillery block at an altitude of 771 metres (2,530 ft). The position was intended, acting with Ouvrage Gordolon, to stop an approach by Italian forces from the north towards Nice through the Vésibie Valley.
Ouvrage Plan Caval is a lesser work of the Maginot Line's Alpine extension, the Alpine Line, also known as the Little Maginot Line. The ouvrage consists of two infantry blocks and one observation block facing Italy. The ouvrage is located on the heights of L'Authion, surrounded by older fortifications. Three additional blocks were planned to make it a gros ouvrage but were not built. Cost for the full ensemble was estimated at 23 million francs.
Ouvrage Col de Brouis is a work of the Maginot Line's Alpine extension, the Alpine Line, also known as the Little Maginot Line. The ouvrage consists of one entry block and two artillery blocks facing Italy at an altitude of 871 metres (2,858 ft). The ouvrage is located about one kilometer north of Monte Grosso. It was placed to control the Col de Brouis and the D 2204 road between the Breil and Sospel.
Ouvrage Monte Grosso is a work of the Maginot Line's Alpine extension, the Alpine Line, also known as the Little Maginot Line. The ouvrage consists of one entry block, four artillery blocks and two observation blocks facing Italy. It was the largest ouvrage in the Alps It is part of the fortifications surrounding Sospel, which protect the approaches to Nice from the north.
Ouvrage L'Agaisen is a work of the Maginot Line's Alpine extension, the Alpine Line, also known as the Little Maginot Line. The ouvrage consists of one entry block, two artillery blocks and one observation block above Sospel. Additional blocks were planned but not built. The ouvrage is located at an altitude of 663 metres (2,175 ft) on the Agaisen massif overlooking Sospel from the north. The position fired 1821 shots from Block 3's 75mm gun turret in 1940. It has an unusual 75mm gun turret in Block 3.
Ouvrage Castillon is a work of the Maginot Line's Alpine extension, the Alpine Line, also called the Little Maginot Line. The ouvrage consists of one entry block, two infantry blocks, and two artillery blocks in a narrow ridge just to the west of Castillon, Alpes-Maritimes. It was built on the original site of Castillon, destroyed by an earthquake in 1887. It is the next gros ouvrage in the line to the north of Ouvrage Sainte-Agnès, and is within firing range of the Mediterranean coastline.
Ouvrage Roquebrune is a work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one entry block, two artillery blocks and one observation block facing Italy. The fortification is located on the heights behind Roquebrune at an elevation of 321 meters overlooking Cap Martin and the bays of Roquebrune and Menton. The ouvrage was manned by 293 men of the 58th Demi-Brigade Alpin de Forteresse (DBAF), supported by the 157th Régiment d'Artillerie de Position (RAP), under the command of Captain Gayot.
Ouvrage Vélosnes is a gros ouvrage of the Maginot Line, located in the Fortified Sector of Montmédy between the towns of Othe and Vélosnes, facing Belgium. It possesses four combat blocks and one entrance block. It is located to the east of petit ouvrage Thonnelle. The position was sabotaged and abandoned by French forces that were ordered to retreat from the exposed position in June 1940 during the Battle of France. The ouvrage is abandoned and is administered as a nature preserve.
Ouvrage Chesnois, also known as Ouvrage Chênois, is a gros ouvrage of the Maginot Line, located in the Fortified Sector of Montmédy, facing Belgium. The ouvrage lies between the towns of Montlibert and Thonne-le-Thil. It possesses six combat blocks. It is located between gros ouvrage Thonnelle and petit ouvrage La Ferté. The position was sabotaged and abandoned by French forces that were ordered to retreat from the exposed position in June 1940 during the Battle of France. The ouvrage is now abandoned and sealed.
