Alpine Line
Encyclopedia
The Alpine Line or Little Maginot Line (French: Petite Ligne Maginot) was the component of the Maginot Line
Maginot Line
The Maginot Line , named after the French Minister of War André Maginot, was a line of concrete fortifications, tank obstacles, artillery casemates, machine gun posts, and other defences, which France constructed along its borders with Germany and Italy, in light of its experience in World War I,...

 that defended the southeastern portion of France
France
The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

. In contrast to the main line in the northeastern portion of France, the Alpine Line traversed a mountainous region of the Maritime Alps
Maritime Alps
The Maritime Alps are a mountain range in the southwestern part of the Alps. They form the border between the French département Alpes-Maritimes and the Italian province of Cuneo. The Col de Tende separates them from the Ligurian Alps; the Maddalena Pass separates them from the Cottian Alps...

, the Cottian Alps
Cottian Alps
The Cottian Alps are a mountain range in the southwestern part of the Alps. They form the border between France and Italy...

 and the Graian Alps
Graian Alps
The Graian Alps are a mountain range in the western part of the Alps. They are located in France , Italy , and Switzerland...

, with relatively few passes suitable for invading armies. Access was difficult for construction and for the Alpine Line garrisons. Consequently, fortifications were smaller in scale than the fortifications of the main Line. The Alpine Line mounted few anti-tank weapons, since the terrain was mostly unsuitable for the use of tanks. Ouvrage Rimplas
Ouvrage Rimplas
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 . It was the first ouvrage of any portion of the Maginot Line to be...

 was the first Maginot fortification to be completed on any portion of the Maginot Line, in 1928. The Alpine Line was unsuccessfully attacked by Italian forces during the Italian invasion of France
Italian invasion of France
The Italian invasion of France in June 1940 was a small-scale invasion that started near the end of the Battle of France during World War II. The goal of the Italian offensive was to take control of the Alps mountain range and the region around Nice, and to win the colonies in North Africa...

 in 1940. Following World War II, some of the larger positions of the Alpine Line were retained in use through the Cold War
Cold War
The Cold War was the continuing state from roughly 1946 to 1991 of political conflict, military tension, proxy wars, and economic competition between the Communist World—primarily the Soviet Union and its satellite states and allies—and the powers of the Western world, primarily the United States...

.

Concept

As France studied measures to protect its northeastern frontier with Germany, a parallel effort was made to examine the improvement of France's defenses against Italy in the southeast. France's Italian border was a relic of the 1860 Treaty of Turin
Treaty of Turin
The Treaty of Turin concluded on March 24, 1860 is the instrument by which the Duchy of Savoy and the County of Nice were annexed to France.-Background:...

 in which the Duchy of Savoy
Duchy of Savoy
From 1416 to 1847, the House of Savoy ruled the eponymous Duchy of Savoy . The Duchy was a state in the northern part of the Italian Peninsula, with some territories that are now in France. It was a continuation of the County of Savoy...

 and the County of Nice
County of Nice
The County of Nice or Niçard Country is a historical region of France, located in the south-eastern part, around the city of Nice.-History:Its territory lies between the Mediterranean Sea , Var River and the southernmost crest of the...

 were incorporated into France. The treaty boundary roughly followed the crest of the Maritime Alps inland through the Cottian Alps to Switzerland. The precise line of demarcation left the upper reaches of many westward-draining valleys in Italian hands, thus giving Italy positions on high points overlooking French territory, most notably Fort Chaberton on Mont Chaberton
Mont Chaberton
Mont Chaberton is a peak in the French Alps in the group known as the Massif des Cerces in the département of Hautes-Alpes.Chaberton is in the municipality of Montgenèvre in the Briançonnais region...

, which threatened Briançon
Briançon
Briançon a commune in the Hautes-Alpes department in the Provence-Alpes-Côte d'Azur region in southeastern France. It is a sub-prefecture of the department....

.

The region had been extensively fortified in the seventeenth, eighteenth and nineteenth centuries, most notably by Vauban
Vauban
Sébastien Le Prestre, Seigneur de Vauban and later Marquis de Vauban , commonly referred to as Vauban, was a Marshal of France and the foremost military engineer of his age, famed for his skill in both designing fortifications and breaking through them...

, whose fortifications of Briançon have been designated a UNESCO World Heritage Site, and by Raymond Adolphe Séré de Rivières
Raymond Adolphe Séré de Rivières
Raymond Adolphe Séré de Rivières was a French military engineer and general whose ideas revolutionized the design of fortifications in France. He gave his name to the Séré de Rivières system of fortifications constructed after the Franco-Prussian War of 1870...

 in the late nineteenth century, who expanded the Fort de Tournoux
Fort de Tournoux
The Fort de Tournoux is a fortification complex in the Ubaye Valley in the French Alps. It was built between 1843 and the early 20th century to defend France against invasion from Italy and Savoy. It was described as the "Military Versailles of the 19th century," resembling a Tibetan monastery on...

 and other fortifications in the area as part of the Séré de Rivières system
Séré de Rivières system
The Séré de Rivières system was an ensemble of fortifications built from 1874 and first used at the beginning of the First World War along the frontiers and coasts of France...

 of fortifications. Passage through the Alps was possible only at a series of comparatively low passes, and movement toward the major cities of southeastern France such as Lyon
Lyon
Lyon , is a city in east-central France in the Rhône-Alpes region, situated between Paris and Marseille. Lyon is located at from Paris, from Marseille, from Geneva, from Turin, and from Barcelona. The residents of the city are called Lyonnais....

, Grenoble
Grenoble
Grenoble is a city in southeastern France, at the foot of the French Alps where the river Drac joins the Isère. Located in the Rhône-Alpes region, Grenoble is the capital of the department of Isère...

 or Nice
Nice
Nice is the fifth most populous city in France, after Paris, Marseille, Lyon and Toulouse, with a population of 348,721 within its administrative limits on a land area of . The urban area of Nice extends beyond the administrative city limits with a population of more than 955,000 on an area of...

 was possible only along a series of deep river valleys. Defenses therefore tended to concentrate in consistent locations:
  • Bourg-Saint-Maurice
    Bourg-Saint-Maurice
    Bourg-Saint-Maurice, popularly known as Bourg, is a commune in the Savoie department in the Rhône-Alpes region in south-eastern France.It is the last large town along the Tarentaise valley in the heart of the French Alps.-History:...

     in the Tarentaise, facing the Little St Bernard Pass
    Little St Bernard Pass
    The Little St Bernard Pass is a mountain pass in the Alps on the France–Italy border. Its saddle is at 2188 metres above sea level. It is located between Savoie, France and Aosta Valley, Italy to the south of the Mont Blanc Massif, precisely on the main alpine watershed. There is also a Great St...

  • Modane
    Modane
    Modane is a commune in the Savoie department in the Rhône-Alpes region in southeastern France.It was part of the Kingdom of Sardinia until 1860.-Transportation:...

     in the Maurienne, facing the Mont Cenis
    Mont Cenis
    Mont Cenis is a massif and pass in Savoie in France which forms the limit between the Cottian and Graian Alps.A road over the pass was built between 1803 and 1810 by Napoleon...

     pass
  • Briançon
    Briançon
    Briançon a commune in the Hautes-Alpes department in the Provence-Alpes-Côte d'Azur region in southeastern France. It is a sub-prefecture of the department....

    , facing the Col de Montgenèvre
    Col de Montgenèvre
    The Col de Montgenèvre is a high mountain pass in the Cottian Alps, between France and Italy.The pass takes its name from the village Montgenèvre , which lies in the vicinity...

  • Barcelonnette
    Barcelonnette
    Barcelonnette is a commune in the Ubaye Valley, in the southern French Alps, in Alpes-de-Haute-Provence department, of which it is a subprefecture.-History:...

    , facing the Col de Larche
  • Approaches to Nice from the north, with defenses in the Tinée and Vesubie valleys, around Sospel
    Sospel
    Sospel is a commune in the Alpes-Maritimes department in southeastern France near the Italian border and not far from Monte Carlo.-History:...

     and on the Authion massif
  • Menton
    Menton
    Menton is a commune in the Alpes-Maritimes department in the Provence-Alpes-Côte d'Azur region in southeastern France.Situated on the French Riviera, along the Franco-Italian border, it is nicknamed la perle de la France ....

     and Nice, guarding the coastal road and railway line

In 1925 General Charles Nollet
Charles Nollet
Charles Marie Edouard Nollet was a French general and government minister, chairman of the Military Inter-Allied Commission of Control from 1919 to 1924, and Minister of War 1924-1925....

, the Minister of War, directed General Jean Degoutte
Jean Degoutte
Jean Degoutte was a French general active in the colonies and the First World War.-References:* accessed 14 September 2010...

 to survey the southeastern frontier and to make recommendations for their defense. Degoutte's proposal used principles of defense in depth to economize on manpower and funds, which were needed for the main Maginot defenses in northeastern France. The still-ambitious plan proposed in 1927 envisioned a series of fortified positions right on the frontier divides at every potential crossing, backed by thirty-six centers of resistance, each with fourteen infantry casemates and twelve infantry shelters, a total of about one thousand blockhouses. Costs were estimated at 250 million francs.

The proposed plan was criticized for placing the fortifications too far forward by the Commission de Defense, but the overall organization was approved by Minister of War (and former Prime Minister) Paul Painlevé
Paul Painlevé
Paul Painlevé was a French mathematician and politician. He served twice as Prime Minister of the Third Republic: 12 September – 13 November 1917 and 17 April – 22 November 1925.-Early life:Painlevé was born in Paris....

, with a strategy of fortifying Menton
Menton
Menton is a commune in the Alpes-Maritimes department in the Provence-Alpes-Côte d'Azur region in southeastern France.Situated on the French Riviera, along the Franco-Italian border, it is nicknamed la perle de la France ....

, Sospel and the valleys of the Vésubie and Tinée. Revisions in late 1927 proposed about 400 positions at a cost of between 400 million and 500 million francs. The plan was altered in 1928 by General Fillonneau, who proposed to concentrate fortifications along potential invasion axes, rather than along a continuous line. The geographic emphasis remained on Menton and Sospel, but the concept of frontal confrontation was replaced by a strategy of attack from the flanks of a potential advance. Fillonneau was assisted by the new management organization for the Maginot fortifications, the Commission d'Organisation des Régions Fortifiés, or CORF. The proposal was estimated to cost 700 million francs to build 103 ouvrages and to reconstruct 28 old fortifications. An initial phase, designed to protect Nice, was estimated to cost 205 million francs

Unlike the relatively thin, linear defenses of the northeast, the revised Alpine fortifications extended some distance back from the frontier, with forward defenses supported by rearward defenses, compartmentalized by the terrain into distinct sectors. A final proposal in 1930 established a scaled-back, prioritized programme of 362 million francs to be executed in two phases, with the second phase to cost an additional 62 million francs.

Description

As with the main Maginot Line of the northeast, positions took the form of concrete-encased strongpoints linked by underground tunnels, which housed living quarters, magazines and utilities for the ouvrage. Larger ouvrages were provided with 60 cm-gauge rail lines to move materials and munitions, although unlike the northeastern positions, none were electrified. Because of the mountainous terrain and the vertical character of the sites chosen for fortification, individual blocks typically emerged from rock faces in a steep hillside or cliff with mined galleries within under rock cover. By comparison, most northeastern ouvrages were semi-submerged into the gently rolling soil with galleries deeply buried beneath earth cover. Many of the high-altitude petits ouvrages could only be built during the brief Alpine summer, leading to extended construction schedules, and causing many of these high outposts to be uncompleted at the outbreak of war in 1940.

In addition to the linked complexes of blockhouses that formed the grand and petit ouvrages, the country around and between each position was provided with isolated blockhouses, observation points, shelters (or abris), outposts (avants postes) and batteries, using much the same vocabulary of rounded concrete forms as the primary line of fortifications. These positions allowed the use of mobile supporting artillery, and provided rallying and control points for the necessary infantry support in the country between strongpoints, as the security of the border did not and could not depend on subterranean fortifications alone. The disposition of forward outposts, backed by heavier fortifications some kilometers to the rear, provided a defense in depth that was, in the case of the Alpine fortifications, supported by the difficult terrain.

Organization

The Alpine Line was divided into three major sectors. From north to south, they were:
  • Fortified Sector of Savoy (secteur fortifié de Savoie), divided into two principal sections, the Tarentaise valley around Bourg-Saint-Maurice, and the Maurienne valley around Modane.
  • Fortified Sector of the Dauphiné
    Fortified Sector of the Dauphiné
    The Fortified Sector of the Dauphiné was the French military organization that in 1940 controlled the section of the Alpine Line portion of the Maginot Line facing Italy in the vicinity of Briançon...

    (secteur fortifié du Dauphiné), protecting Briançon and the Ubaye valley opposite the Col de Larche.
  • Fortified Sector of the Maritime Alps (secteur fortifié des Alpes-Maritimes), covering the Tinée and Vésubie valleys and the coast around Sospel and Menton.


In addition, the area to the north of the principal fortifications was organized as the Defensive Sector of the Rhône
Defensive Sector of the Rhône
The Defensive Sector of the Rhône was the French military organization that in 1940 controlled the section of the French border with Switzerland and Italy in the area of Geneva. The area was not regarded as a likely point of invasion, owing to the neutrality of Switzerland and the extremely...

, with virtually no fixed fortifications, since it faced neutral Switzerland.

The Alpine region was under the overall command of the Army of the Alps, General René Olry
René Olry
René-Henri OlryCLH was a French general and commander of the Army of the Alps during the Battle of France of World War II.-Early life:Olry was born on 28 June 1880 in Lille in the Nord-Pas-de-Calais region of France....

 in command at Valence
Valence, Drôme
Valence is a commune in southeastern France, the capital of the Drôme department, situated on the left bank of the Rhône, south of Lyon on the railway to Marseilles.Its inhabitants are called Valentinois...

. Its chief units were the 14th Army Corps in the SF Savoy and SF Dauphiné, and the 15th Corps in the SF Maritime Alps.

Construction

Work had already begun on Ouvrage Rimplas
Ouvrage Rimplas
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 . It was the first ouvrage of any portion of the Maginot Line to be...

, which was in fact the first Maginot ouvrage to be built in either the northeast or southeast. The construction contract was signed 7 September 1928 with incomplete plans. Rimplas was a prototype project, not representative of other alpine or Maginot positions. CORF took over responsibility for construction in 1931, standardizing design practices, although each project was closely adapted to local circumstances. Construction was made difficult by poor access, high altitude and a short construction season.In 1931 work commenced at twenty-two sites. In 1932 Ouvrage Cap Martin
Ouvrage Cap Martin
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...

 was sufficiently complete that it could be used in an emergency. Work continued through 1936, even though CORF had been disestablished at the end of 1935. While most of the larger positions were complete, a number of the smaller, higher-altitude positions were never completed in time for war in 1940. From 1937, the main d'oeuvre Militaire (MOM) built a number of light positions and blockhouses, usually in locations close to the frontier. Many of the MOM positions were incomplete in 1940.

Compared with the northeastern Maginot positions, the Alpine fortifications made comparatively little use of retracting turrets, using instead concreted casemates in mountainsides surveying prepared fields of fire. The Alpine Line featured relatively few artillery ouvrages, tending instead to use mixed-arms positions that combined artillery casemates and infantry positions. The main fortifications were supported by infantry shelters, or abris, of both the "passive", lightly armed type, and "active" abris with heavier armament. Some of the mountaintop gros ouvrages used aerial tramways for their primary means of access. Military roads were often constructed in the absence of existing access. All of the large positions were provided with subterranean barracks and central utility plants. Nearly all fortifications were excavated from solid rock. Coverage could therefore be reduced compared to the ouvrages of the northeast, which were at depths of up to 30 metres (98.4 ft) in deep soil to resist heavy siege artillery. Independent means of power generation were a necessity in the absence of a utility distribution system. Likewise, telephone communication was problematic, with many positions using line-of-sight optical semaphores for communication.

June 1940

Like the main Maginot Line did with the Germans, the Alpine Line achieved the goal of preventing the Italians from advancing through the protected areas. And, as the Italians had no alternative but to directly confront the fortifications the south of France was completely protected from the Italian advance. An advance along the main coastal road was delayed by stiff resistance at the Casemate du Pont Saint Louis on the border at Menton, which was manned by seven men led by a non-commissioned officer
Non-commissioned officer
A non-commissioned officer , called a sub-officer in some countries, is a military officer who has not been given a commission...

 and was supported by main-line fortifications at Ouvrage Cap Martin
Ouvrage Cap Martin
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...

. A direct assault on Cap Saint Martin was suppressed by the ouvrage itself, supported by artillery fire from Ouvrage Mont Agel
Ouvrage Mont Agel
Ouvrage Mont Agel is a work of the Maginot Line's Alpine extension, the Alpine Line, also called the Little Maginot Line. The 1930s ouvrage was built in and around the earlier mountaintop Fortress of Mont Agel. The ouvrage forms a backup to the main curtain of Alpine Line forts, and was not...



Two more attacks were mounted, in the areas of Briançon
Briançon
Briançon a commune in the Hautes-Alpes department in the Provence-Alpes-Côte d'Azur region in southeastern France. It is a sub-prefecture of the department....

 and the Little St Bernard Pass
Little St Bernard Pass
The Little St Bernard Pass is a mountain pass in the Alps on the France–Italy border. Its saddle is at 2188 metres above sea level. It is located between Savoie, France and Aosta Valley, Italy to the south of the Mont Blanc Massif, precisely on the main alpine watershed. There is also a Great St...

, with little effect due to weather and the difficult terrain. Positions in the high Alps
Alps
The Alps is one of the great mountain range systems of Europe, stretching from Austria and Slovenia in the east through Italy, Switzerland, Liechtenstein and Germany to France in the west....

 were shelled by Italian forces but were not directly attacked. Ouvrage Barbonnet
Ouvrage Barbonnet
Ouvrage Barbonnet 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 and one infantry block facing Italy...

 traded fire with Italian positions prior to the armistice of 25 June 1940.

Vallo Alpino

The Italian counterpart to the Alpine Line was Italy
Italy
Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

's Alpine Wall
Alpine Wall
The Alpine Wall was a system of fortifications along Italy's northern frontier built in the years leading up to World War II...

 (Vallo Alpino), the western portions of which faced the Alpine Line across the Alpine Valleys.

See also


External links

  • Fortiff.be, detailed information on all Maginot fortifications
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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