Ouvrage Kobenbusch is a gros ouvrage of the Maginot Line, located in the Fortified Sector of Thionville in the Cattenom forest. It possesses seven combat blocks and two entrance blocks, one for ammunition and the other for men. It is located between petit ouvrage Bois-Karre and petit ouvrage Oberheid, and was named for the surrounding Kobenbusch forest. The position saw little action during World War II. Its deep passages have been flooded by the construction of a cooling water lake for a nearby nuclear power plant, but its surface features are being developed with an interpretive path through the surrounding forest.
Ouvrage Hochwald is a gros ouvrage of the Maginot Line, one of the largest fortifications in the Line. Located on the Hochwald ridge in the Fortified Sector of Haguenau in the community of Drachenbronn-Birlenbach in the Bas-Rhin department of northeastern France, it was designed to protect the northern Vosges region of France. Ouvrage Hochwald is sometimes considered as two ouvrages because of its separation of the western and the eastern portions of the ouvrage. Uniquely, the original plans for the position included an elevated battery to the rear with long-range 145 mm or 155 mm gun turrets of a new kind. Hochwald is used by the French Air Force as an armoured air defense coordination center.
Ouvrage Hackenberg, one of the largest of the Maginot Line fortifications, is part of the Fortified Sector of Boulay. It is situated twenty kilometres east of Thionville, in the Moselle département, near the village of Veckring, on the Hackenberg. It is located between gros ouvrage Billig and petit ouvrage Coucou, facing Germany. The fort occupies the wooded Hackenberg ridge. Before World War II it was considered a showpiece of French fortification technology, and was visited by British King George VI.
Ouvrage Mont des Welches, a gros ouvrage of the Maginot Line fortifications, is part of the Fortified Sector of Boulay. It comprises two entrance blocks, one infantry block, one artillery block, one observation block and two combination blocks. It is located between petit ouvrage Coucou and gros ouvrage Michelsberg, facing Germany. Relatively small for a gros ouvrage, Mont des Welches saw a brief period of sharp action in June 1940, when German forces moving along the rear of the Maginot Line engaged the position without success. After modest renovations in the 1950s, Mont des Welches was abandoned in the 1970s.
Ouvrage Bovenberg is a lesser work of the Maginot Line. Located in the Fortified Sector of Boulay, the ouvrage is located between petits ouvrages Berenbach and Denting, facing Germany. It consists of two infantry blocks and two artillery blocks.
Ouvrage Métrich located in the village of Kœnigsmacker in Moselle, comprises part of the Elzange portion of the Fortified Sector of Thionville of the Maginot Line. A gros ouvrage, it is the third largest of the Line, after Hackenberg and Hochwald. It lies between petit ouvrage Sentzich and gros ouvrage Billig, facing Germany. Located to the east of the Moselle, it cooperated with Ouvrage Galgenberg to control the river valley.
Ouvrage Fermont is a gros ouvrage of the Maginot Line, part of the Fortified Sector of the Crusnes in northeastern France, near the community of Montigny-sur-Chiers. It is located near the commune of Montigny-sur-Chiers, between the petit ouvrage Ferme Chappy and the gros ouvrage Latiremont. The position is near the western end of the Line, about four kilometers east of Longuyon, facing Belgium. There was significant combat at Fermont during the last stages of the Battle of France. It was repaired and reactivated during the 1950s and 1960s as a strongpoint in the event of an invasion by Soviet forces. After being abandoned by the military, it has been restored and is maintained as a museum.
Ouvrage Bréhain is part of the Fortified Sector of the Crusnes of the Maginot Line, located near the community of Bréhain-la-Ville in the Meurthe-et-Moselle département of France. Bréhain is flanked by petits ouvrages Mauvais Bois and Aumetz. The gros ouvrage was equipped with long-range artillery, and faced the border with Luxembourg. It saw no major action in either the Battle of France in 1940 or the Lorraine Campaign of 1944. While not open to public visitation, it has been secured and is in relatively good condition when compared to other abandoned Maginot positions. A flanking casemate has been restored and may be visited.
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 Roche-la-Croix 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 infantry blocks, one artillery block and two observation blocks in the vicinity of the Col de Larche. An aerial tram was provided for better access. The position is located at the top of a sheer escarpment that dominates Meyronnes and the valley of the Ubayette.
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 Bonnette. 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 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 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 Col de Garde is a lesser work of the Maginot Line's Alpine extension, the Alpine Line, also called the Little Maginot Line. The ouvrage consists of two entry blocks, one infantry block and one observation block, slightly more than 1 km south of Sainte-Agnès.
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 Cap Martin is a work of the Maginot Line's Alpine extension, the Alpine Line, also called the Little Maginot Line. The ouvrage, located on high ground in Roquebrune, consists of two artillery blocks and one combination block facing Italy. The ouvrage was at the southernmost end of the Alpine Line and overlooked the Mediterranean Sea coastline at an altitude of 21 meters between Nice and Menton, facing towards Italy. The ouvrage and its advance casemate at Pont Saint Louis controlled the coastal roads along the Mediterranean.
Ouvrage Sainte-Agnès was a work of the Maginot Line's Alpine extension, the Alpine Line, also called the Little Maginot Line. The fortification was built between 1932 and 1938. The site is at the south edge of the hill town of Sainte-Agnès, Alpes-Maritimes at an elevation of 780 metres overlooking the Mediterranean Sea.
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 ouvrvage 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.
