Ouvrage Sapey

Ouvrage Sapey
Ouvrage Sapey
Type of work:	Large artillery work (Gros ouvrage)
sector ; └─sub-sector	Fortified Sector of Savoy; └─Moyenne-Maurienne, Quartier de l'Arc
Regiment:	71st Batailllon Alpin de Fortresse, 164th Régiment d'Artillerie de Position
Number of blocks:	4 + entry
Strength:	5 officers, 144 men

Ouvrage Sapey
Ouvrage Sapey
Part of Maginot Line, Alpine Line, Séré de Rivières system
Southeast France
	Ouvrage Sapey
Coordinates	45°12′11″N6°38′59″E / 45.20307°N 6.64967°E
Site information
Controlled by	France
Site history
Built	1931
Built by	CORF
In use	Abandoned
Materials	Concrete, steel, rock excavation
Battles/wars	Battle of France

Last updated March 01, 2024

Ouvrage Sapey is a work (gros ouvrage) 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.^[1]

Fort du Sapey

The Fort du Sapey is the center of an ensemble of fortifications designed to protect Modane, the valley of the Arc and the terminus of the Fréjus Rail Tunnel to Italy, which was completed in 1871. The fort was built 1,600 metres (5,200 ft) to the west of Modane at an altitude of about 1,700 metres (5,600 ft), on a hill that dominates the entire valley. The principal fort was built between 1884 and 1892 as part of the Séré de Rivières system. Construction was initially of stone, but concrete was added after the invention of high explosive made masonry construction untenable in fortifications. Additional work was undertaken in 1913, continuing until work stopped in 1916. The work reinforced magazines, batteries and shelters and excavated galleries for further shelters into the rock. A special battery was built and excavated into the rock to directly cover the end of the Fréjus tunnel. The entire ensemble was surrounded by a wall.^[3]

The position received a disproportionate amount of resources, considering the limited possibilities for enemy attack through the tunnel or over the Mont Cenis pass.^[3]

Batterie du Sapey

The battery covering the end of the rail tunnel was completed between 1913 and 1916, mounting six 155mm guns. It was renovated in the 1930s, but unaltered. The position remained military property into the 2000s, and is presently abandoned. It is owned by the commune of Modane. Access is forbidden.^[4]

Sapey barracks

The barracks were built in 1898 and partly modernized between 1913 and 1916. The barracks were provided with a large underground shelter or abri-caverne capable of housing 500. A number of access galleries exist and connect to the later Maginot ouvrages. The barracks are community property.^[5]

Redoute du Sapey

The principal redoubt of Sapey was built between 1885 and 1892. Manned by 36 soldiers under 4 officers, it mounted ten de Bange 120mm guns, six in the main fortification and four in an annex. The redoubt was provided with a drawbridge and impressive walls. The casemates were cut from rock and accessed by underground galleries. Renovations in the 1930s provided concrete reinforcement. The redoubt was kept as military property until the 21st century, but has suffered considerable deterioration. It is now community property and may not be accessed.^[6]

Ouvrage du Sapey

The Maginot ouvrage extended under the barracks and redoubt of Fort Sapey. Entered from the west, the galleries connected to the old abris of the barracks, emerging at combat blocks under the walls for the redoubt on the east side. The proposed 145mm turret was to be built in the area of the barracks, near the underground utility plant.^[7]

Description

Block 1 (artillery): one observation launcher cloche, and machine gun cloche, four 75mm gun embrasures (also known as crenellations) and one heavy twin machine gun/47mm anti-tank gun embrasure.^[8]
Block 2 (artillery): one 75mm gun embrasure (Battery Maurienne).^[7]^[9]
Block 3 (observation): one observation cloche and two observation embrasures.^[10]
Block 4 (artillery): two 75mm gun embrasures (Battery Fréjus).^[7]^[11]
Entry block: one machine gun cloche and one machine gun/47mm anti-tank gun embrasure.^[12]

A 145mm gun turret was planned but never installed.^[7]

History

The 75mm guns of Sapey Fréjus battery fired on Italian troops in the vicinity La Roue on 20 June 1940. The next day the battery fired on the Vallée-Étroite. Fréjus was joined by Battery Maurienne on the 22nd, firing on Italian forces in the vicinity of Bramans. The next day the ouvrage fired toward Planey. Further bombardments followed on the 24th and 25th, ceasing with the armistice of the 25th. Fire direction as provided by Ouvrage Saint-Antoine. A total of 1428 shots were fired by Maurienne and 981 by Fréjus.^[13]

After the 1940 armistice, Italian forces occupied the Alpine ouvrages and disarmed them. In August 1943, southern France was occupied by the German 19th Army, which took over many of the Alpine positions that had been occupied by the Italians until Italy's withdrawal from the war in September 1943.

In 1944, Sapey was recaptured relatively easily on 13 September.^[14] Sapey had suffered little damage during the war, apart from the destruction of its aerial tram, and by the end of 1944 was partly repaired and placed into service. Immediately after the war, the Maurienne region was regarded as an area of medium priority for restoration and reuse by the military. By the 1950s the positions in the Southeast of France were restored and operational again. However, by 1960, with France's acquisition of nuclear weapons, the cost and effectiveness of the Maginot system was called into question. Between 1964 and 1971 nearly all of the Maginot fortifications were deactivated.^[15]

Related Research Articles

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.

<span class="mw-page-title-main">Ouvrage Hackenberg</span>

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 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 Molvange is a large work, or gros ouvrage of the Maginot Line. The fortification complex faces the France-Luxembourg border from a height near Entrange in the Moselle department. The complex, armed and occupied in 1935, is located on the heights of Entrange, at an altitude of about 400 metres (1,300 ft). Molvange is flanked by the even larger Ouvrage Rochonvillers to the west and smaller petit ouvrage Immerhof to the east, part of the Fortified Sector of Thionville. Molvange was not involved in significant combat during World War II, but due to its size it was repaired and retained in service after the war. During the Cold War, Molvange's underground barracks and former ammunition magazine became a hardened military command centre.

Ouvrage Grand-Hohékirkel is a petit ouvrage of the Maginot Line, located near Bitche in the French département of Moselle. Grand-Hohékirkel is adjoined by gros ouvrage Otterbiel to the west and petit ouvrage Lembach at some distance to the east, and faces the German frontier. It was part of the Fortified Sector of the Vosges.

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 Le Lavoir Is a 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, three artillery blocks and one observation block 6 kilometres (3.7 mi) south of Modane, France, guarding the Col de Fréjus. The surface barracks at Le Lavoir were connected to Charmaix by an aerial tram.

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 Arrondaz 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 one entry block, one infantry block, and one observation block fin the vicinity of the Col de Fréjus to the south of Modane at an altitude of 2,500 metres (8,200 ft). All but one of the blocks are presently buried by later construction.

Ouvrage Les Rochilles is a lesser work of the Maginot Line's Alpine extension, the Alpine Line, in the high Alps about 20 kilometres (12 mi) southwest of Modane. The ouvrage consists of one entry block, two infantry blocks and one observation block. Unusually, it was built by the Main d'Oeuvre Militaire (MOM), rather than CORF, which built most of the larger positions. The design was by CORF.

Ouvrage Janus is a work of the Maginot Line's Alpine extension, the Alpine Line, located to the east of Briançon on near the Col de Montgenèvre. The ouvrage consists of one entry block, two infantry blocks, two artillery blocks, two observation blocks and one combination block at an altitude of 2,540 metres (8,330 ft), the second highest fortification on the Alps in 1940. Built on the site of the old Fort Janus, it retained the old fort's 95mm naval guns and added two 75mm guns

Ouvrage Gondran 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. Gondran was commenced in June 1933, and was intended to cover the gap between Janus and Les Aittes. The site is close to two older forts, designated Gondran C and Gondran D. The Maginot fortification became known as Gondran E.

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 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 Col du Fort is a lesser work of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one infantry block and one observation block at an elevation of 1,717 metres (5,633 ft). An additional block was 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.

The Fort du Replaton is a fortification of the Séré de Rivières system in Modane, France. The fort was built to provide artillery cover for the French end of the Fréjus Rail Tunnel 800 metres (2,600 ft) away horizontally. It is connected to Modane by an aerial tram, which continues on from Replaton to the Fort du Sapey on a much higher eminence.

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.

References

↑ Mary, Tome 4, p. 29
↑ Puelinckx, Jean; Aublet, Jean-Louis; Mainguin, Sylvie (2010). "Modane (Place de)". Index de la fortification francaise 1874–1914 (in French). fortiff.be. Retrieved 10 February 2010.
1 2 Puelinckx, Jean; et al. (2010). "Sapey (ensemble fortifié du)". Index de la fortification francaise 1874–1914 (in French). fortiff.be. Retrieved 10 February 2010.
↑ Puelinckx, Jean; et al. (2010). "Sapey (batterie du)". Index de la fortification francaise 1874–1914 (in French). fortiff.be. Retrieved 10 February 2010.
↑ Puelinckx, Jean; et al. (2010). "Sapey (baraquements du)". Index de la fortification francaise 1874–1914 (in French). fortiff.be. Retrieved 10 February 2010.
↑ Puelinckx, Jean; et al. (2010). "Sapey (redoute du)". Index de la fortification francaise 1874–1914 (in French). fortiff.be. Retrieved 10 February 2010.
1 2 3 4 Mary, Tome 5, pp. 14–15
↑ Puelinckx, Jean; et al. (2010). "Sapey (go du) Bloc 1". Index de la Ligne Maginot (in French). fortiff.be. Retrieved 10 February 2010.
↑ Puelinckx, Jean; et al. (2010). "Sapey (go du) Bloc 2". Index de la Ligne Maginot (in French). fortiff.be. Retrieved 10 February 2010.
↑ Puelinckx, Jean; et al. (2010). "Sapey (go du) Bloc 3". Index de la Ligne Maginot (in French). fortiff.be. Retrieved 10 February 2010.
↑ Puelinckx, Jean; et al. (2010). "Sapey (go du) Bloc 4". Index de la Ligne Maginot (in French). fortiff.be. Retrieved 10 February 2010.
↑ Puelinckx, Jean; et al. (2010). "Sapey (go du) Entrée mixte". Index de la Ligne Maginot (in French). fortiff.be. Retrieved 10 February 2010.
↑ Mary, Tome 5, pp. 97–99
↑ Mary, Tome 5, p. 147
↑ Mary, Tome 5, pp. 164–175

Bibliography

Allcorn, William. The Maginot Line 1928–45. Oxford: Osprey Publishing, 2003. ISBN 1-84176-646-1
Kaufmann, J.E. and Kaufmann, H.W. Fortress France: The Maginot Line and French Defenses in World War II, Stackpole Books, 2006. ISBN 0-275-98345-5
Kaufmann, J.E., Kaufmann, H.W., Jancovič-Potočnik, A. and Lang, P. The Maginot Line: History and Guide, Pen and Sword, 2011. ISBN 978-1-84884-068-3
Mary, Jean-Yves; Hohnadel, Alain; Sicard, Jacques. Hommes et Ouvrages de la Ligne Maginot, Tome 1. Paris, Histoire & Collections, 2001. ISBN 2-908182-88-2 (in French)
Mary, Jean-Yves; Hohnadel, Alain; Sicard, Jacques. Hommes et Ouvrages de la Ligne Maginot, Tome 4 – La fortification alpine. Paris, Histoire & Collections, 2009. ISBN 978-2-915239-46-1 (in French)
Mary, Jean-Yves; Hohnadel, Alain; Sicard, Jacques. Hommes et Ouvrages de la Ligne Maginot, Tome 5. Paris, Histoire & Collections, 2009. ISBN 978-2-35250-127-5 (in French)

External links

Sapey (gros ouvrage du) at fortiff.be (in French)
Sapey (ensemble fortifié du) at fortiff.be (in French)
Sapey (fort du) at fortiff.be (in French)
Sapey (redoute du) at fortiff.be (in French)
Sapey (batterie du) at fortiff.be (in French)
Sapey (baraquement du) at fortiff.be (in French)

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[hetou1-1] Mary, Tome 4, p. 29

[fortiffbe0-2] Puelinckx, Jean; Aublet, Jean-Louis; Mainguin, Sylvie (2010). "Modane (Place de)". Index de la fortification francaise 1874–1914 (in French). fortiff.be. Retrieved 10 February 2010.

[fortiffbe1-3] 1 2 Puelinckx, Jean; et al. (2010). "Sapey (ensemble fortifié du)". Index de la fortification francaise 1874–1914 (in French). fortiff.be. Retrieved 10 February 2010.

[fortiffbe2-4] Puelinckx, Jean; et al. (2010). "Sapey (batterie du)". Index de la fortification francaise 1874–1914 (in French). fortiff.be. Retrieved 10 February 2010.

[fortiffbe3-5] Puelinckx, Jean; et al. (2010). "Sapey (baraquements du)". Index de la fortification francaise 1874–1914 (in French). fortiff.be. Retrieved 10 February 2010.

[fortiffbe4-6] Puelinckx, Jean; et al. (2010). "Sapey (redoute du)". Index de la fortification francaise 1874–1914 (in French). fortiff.be. Retrieved 10 February 2010.

[hetou5-1-7] 1 2 3 4 Mary, Tome 5, pp. 14–15

[fortiffbe5-8] Puelinckx, Jean; et al. (2010). "Sapey (go du) Bloc 1". Index de la Ligne Maginot (in French). fortiff.be. Retrieved 10 February 2010.

[fortiffbe6-9] Puelinckx, Jean; et al. (2010). "Sapey (go du) Bloc 2". Index de la Ligne Maginot (in French). fortiff.be. Retrieved 10 February 2010.

[fortiffbe7-10] Puelinckx, Jean; et al. (2010). "Sapey (go du) Bloc 3". Index de la Ligne Maginot (in French). fortiff.be. Retrieved 10 February 2010.

[fortiffbe8-11] Puelinckx, Jean; et al. (2010). "Sapey (go du) Bloc 4". Index de la Ligne Maginot (in French). fortiff.be. Retrieved 10 February 2010.

[fortiffbe9-12] Puelinckx, Jean; et al. (2010). "Sapey (go du) Entrée mixte". Index de la Ligne Maginot (in French). fortiff.be. Retrieved 10 February 2010.

[13] Mary, Tome 5, pp. 97–99

[14] Mary, Tome 5, p. 147

[15] Mary, Tome 5, pp. 164–175

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v t e Alpine Line (Little Maginot Line)
Fortified Sector of Savoy (La Tarentaise)	Chatelard Cave-à-Canon Redoute Ruinée
Fortified Sector of Savoy (La Maurienne)	Sapey Saint-Gobain Saint-Antoine Le Lavoir Pas du Roc Arrondaz Les Rochilles
Fortified Sector of the Dauphiné	Janus Col de la Buffère Col du Granon Les Aittes Gondran Roche-la-Croix Saint Ours Haut Plate Lombard Fontvive Nord-ouest Saint Ours Nord-est Saint Ours Bas Restefond Col de Restefond Granges Communes La Moutière
Fortified Sector of the Maritime Alps	Col de Crous Col de la Valette Rimplas Fressinéa Valdeblore La Séréna Col du Caire Gros Col du Fort Gordolon Flaut Baisse de Saint-Véran Plan Caval La Béole Col d'Agnon La Déa Col de Brouis Monte Grosso Champ de Tir L'Agaisen Saint-Roch Barbonnet Castillon Col des Banquettes Saint-Agnès Col de Garde Mont Agel Roquebrune Croupe du Réservoir Cap Martin
Corsica	Defensive Organization of Corsica

v t e Fortifications in the Séré de Rivières system
Fortified region of Dunkerque	Mardyck Petite-Synthe Dunes Zuydcoote
Fortified region of Lille	Englos Lompret Vert-Galant Bondues Mons-en-Barœul Sainghin Enchemont Vendeville Seclin
Lille-Maubeuge	Maulde Flines Curgies
Fortified region of Maubeuge	Grévaux Feignies Leveau Heron-Fontaine Les Sarts Bersillies La Salmagne Boussois Rocq Cerfontaine Bourdiau Hautmont
Oise gap	Hirson Ayvelles
Fortified region of Verdun	Belleville Saint-Michel Souville Hôpital Tavannes Belrupt Froideterre Thiaumont Douaumont Vaux La Laufée Eix Moulainville Déramé Rozelier Haudainville La Falouse Dugny Regret Sartelles Bois-Bourrus Marre Vacherauville Charny
Meuse heights	Génicourt Troyon Paroches Camp-des-Romains Liouville Saint-Agnant Gironville Jouy-sous-les-Côtes
Fortified region of Toul	Saint-Michel Justice Écrouves Bruley Lucey Trondes Cloche Bouvron Vieux-Canton Est du Vieux-Canton Mordant Gondreville Villey-le-Sec Chaudeney Dommartin Tillot Blénod Domgermain
Charmes gap	Manonviller Frouard Éperon Pont-Saint-Vincent Pagny-la-Blanche-Côte Bourlémont
Fortified region of Épinal	Fort d'Arches Fort d'Uxegney Fort de Bois l'Abbé Fort de Girancourt Fort de Longchamp Fort de Razimont Fort du Roulon Fort de la Grande-Haye Fort de Dogneville Fort de la Voivre Fort de la Mouche Fort du Bambois Fort des Adelphes Batteries du Thiéha Batterie de Sanchey Batterie des Friches Ouvrage de Deyvillers
Upper Moselle	Fort d'Arches Fort du Parmont Fort de Rupt Fort de Château-Lambert Fort de Servance Fort de Giromagny
Fortified region of Belfort	Fort du Salbert Fort de Roppe Fort du Bois d'Oye Fort des Basses Perches Fort des Hautes Perches Magasin de secteur du Bosmont Réduit du Bosmont Fort de Vézelois Fort du Mont Vaudois Ouvrage du Monceau Ouvrage de Meroux
Belfort Gap	Fort du Mont Bart Fort du Lomont Batterie des Roches Fort Lachaux
Jura massif	Larmont supérieur Larmont inférieur Joux Saint-Antoine Les Rousses Risoux
Fortified region of Besançon	Fort de Planoise Batterie du Rosemont Ouvrage d'Au-Bois Batterie de la Ferme de l'Hôpital Fort des Justices Fort des Montboucons Ouvrages de Pouilley-les-Vignes Batterie du Calvaire Fort de Châtillon-le-Duc Fort de Chailluz Batterie de la Fourche de Chailluz Batterie de la Charrière de Chailluz Fort Benoit Fort de Montfaucon Batterie de la Carrière Redoute de Montfaucon Batterie des Épesses Batterie des Rattes Fort de l'est des Buis Fort de l'ouest des Buis Fort de Fontain Batterie Rolland Fort de Pugey
Savoie	Lestal Tamié Villard Mont Laitelet Aiton Montgilbert Vulmix Truc Platte Télégraphe Sapey Replaton
Briançon and Tournoux	Olive Infernet Croix-de-Bretagne Lausette Viraysse Roche-la-Croix Cuguret Pelousette
Fortified region of Nice	La Forca Milles-Fourches Pic-Charvet Barbonnet Mont-Agel Tête-de-Chien Revère Drête Mont-Chauve de Tourette Mont-Chauve d'Aspremont Bégude Colomars Cap-Ferrat Mont-Boron Cimetière-Russe
Fortified region of La Fère	Liez Vendeuil Mayot
Fortified region of Laon	La Malmaison Laniscourt Montbérault Condé
Fortified region of Reims	Chenay (réduit) Brimont Loivre Cran de Brimont Fresne Witry-lès-Reims Vigie de Berru Berru (batteries) Nogent-l'Abbesse La Pompelle Montbré Saint-Thierry
Fortifications of Paris in the 19th and 20th centuries	Fort de Cormeilles Fort de Montlignon Fort de Domont Fort de Montmorency Fort d'Écouen Redoute de la Butte-Pinson Fort de Stains Fort de Vaujours Fort de Chelles Fort de Villiers Fort de Champigny Fort de Sucy Fort de Villeneuve Fort de Palaiseau Fort de Châtillon Fort de Villeras Batterie de Bouviers Batterie du Ravin de Bouviers Fort du Haut-Buc Fort de Saint-Cyr Fort du Trou-d'Enfer Batterie de Bois-d'Arcy
Fortifiications of Langres	Peigney Bonnelle Brévoines Buzon Marnotte Saint-Menge Dampierre Plesnoy Montlandon Cognelot Pointe de Diamant
Fortified region of Dijon
Ceintures de Lyon	Mur d'enceinte de Croix-Luizet à Gerland Fort du Mont Verdun Batterie de Narcel Batterie du Mont-Thou Batterie des Carrières Batterie de la Freta Fort de Vancia Batterie de Sathonay Magasin de Sathonay Magasin de Saint-Fons Batterie de Sermenaz Redoutes de Neyron Fort de Meyzieu Fort de Genas Fort de Bron Batterie de Lessivas Batterie de Parilly Fort de Saint-Priest Fort de Corbas Fort de Feyzin Fort de Champvillard Fort de Montcorin Fort de Côte-Lorette Fort du Bruissin Fort de Chapoly Fort du Paillet
Fortified region of Grenoble	Fort de la Bastille Fort de Comboire Fort de Montavie Fort des Quatre Seigneurs Fort du Bourcet Fort du Mûrier Fort du Saint-Eynard
Fortified region of Toulon	Six-Fours Peyras (batterie) Gros-Cerveau Pipaudon Mont-Caume Croix-Faron Coudon Colle-Noire
Roussillon	Serrat d'En Vaquer Cap-Béar
Atlantic coast	Verdon (Gironde) Saumonards (batterie) (Oléron) Aix (batteries) Sablanceau (batterie) (Ré) Ève et Ville-ès-Martin (batterie) (Loire) Kernevest (Morbihan) Fort Neuf et Saint-Julien (Quiberon) Locqueltas et Talud (Lorient) Taillefer, Ramonet et du Gros-Rocher (redoute) (Belle-Île) Haut-Grognon et Surville (Groix) Crozon, Landaoudec et Toulbroc'h (Brest) Hève (batterie) (Le Havre) Crèche (batterie) (Boulogne)
Overseas colonial empire	Djebel Kébir (Bizerte) Cap Manuel (Dakar) Bel-Air (Dakar) Route de Baria (Saigon) Cap Saint-Jacques (Saigon) Rạch Cát (Saigon)