Maginot Line
In January 1923, French troops marched into the Ruhr region of Germany to enforce reparations payments. This occupation sparked a diplomatic crisis that lasted until September 1923 and led Britain to condemn France's actions. The British government applied intense economic pressure on Paris to change its policies toward Berlin. A conference in London during 1924 convinced French Premier Édouard Herriot to abandon cherished positions on the Reparations Commission. The great conclusion drawn in Paris was that France could not make unilateral military moves without risking British hostility. French leaders believed they needed Britain's help to win another war against Germany. From 1871, French elites had concluded that France had no hope of defeating Germany on its own. They would need an alliance with another great power to prevail. By 1929, the decision to build the Maginot Line became a tacit admission that Germany would soon rearm. The French economy was hobbled by the need to reconstruct damage from World War I. German territory had seen little fighting and possessed an economy twice as large as France's. France counted 40 million inhabitants while Germany had 70 million. Military chiefs were dubious about their ability to win another offensive war without allies. The American historian William Keylor noted that the decision to build the line was not irrational but a sensible response to the coming withdrawal from the Rhineland.
Construction began in 1930 under the Service Technique du Génie overseen by the Commission d'Organisation des Régions Fortifiées. The main construction was largely completed by 1939 at a cost of around 3 billion French francs. There are 45 main forts known as grands ouvrages and 97 smaller forts called petits ouvrages. Over 200 kilometers of tunnels connected these structures. The largest guns were fortress guns measuring 75 millimeters. These fortifications did not extend through the Ardennes Forest which Commander-in-Chief Maurice Gamelin believed impenetrable. Anti-tank obstacles consisted of four to six rows of upright railway lines set in concrete. Barbed wire obstructions covered fields of anti-tank mines overlooked by twin machine-guns. Infantry casemates featured two floors with firing levels and support infrastructure including power-generating units. Ventilation systems, water storage, and food reserves allowed crews to hold out for weeks. Retractable turrets included models from 1933 and 1932 alongside older 1905 designs. Narrow-gauge railways rearmored and resupplied main fortresses up to 100 kilometers away. High-voltage transmission lines provided electric power to many fortifications initially above ground then buried.
Maginot Line fortifications were manned by specialist units of fortress infantry artillery and engineers. All these troops wore distinctive uniform insignia and considered themselves among the elite of the French Army. Full-time Maginot Line troops were accommodated in barracks built close to the fortresses. They also lived in complexes of wooden housing adjacent to each fortress more comfortable than living inside but not expected to survive wartime bombardment. Training was carried out at a fortress near the town of Bitche in Moselle in Lorraine. This facility was capable of live fire exercises impossible elsewhere as other parts of the line were located in civilian areas. Gros ouvrages housed crews ranging from 500 to more than 1,000 men. These fortresses contained infrastructure such as power stations independent ventilating systems barracks mess halls kitchens water storage distribution systems hoists ammunition stores workshops spare parts and food stores. Infantry casemates often had one or two cloches or turrets located on top of them. GFM cloches sometimes emplaced machine guns or observation periscopes. Twenty to thirty men manned these smaller bunkers while larger forts required hundreds of personnel for operation and maintenance.
On the 10th of January 1940 the Mechelen incident revealed German plans to the Allies. The German Army redirected its effort against the weak point in the French defensive front through the Ardennes Forest. General Maurice Gamelin believed this region with rough terrain would be an unlikely invasion route by German forces. If traversed it would be done at a slow rate allowing time to bring up reserves. The Manstein plan replaced the original plan with a gamble that main German armored force could cross the Ardennes. They crossed the Meuse river and raced down the Somme valley encircling much of Allied forces in the north. This led to the Dunkirk evacuation leaving troops to the south unable to mount effective resistance. The Germans were able to avoid direct assault on the Maginot Line by violating neutrality of Belgium Luxembourg and Netherlands. Attacking on the 10th of May German forces were well into France within five days. They continued advancing until the 24th of May when they stopped near Dunkirk. During the advance to the English Channel Germans overran France's border defense with Belgium and several Maginot Forts in Maubeuge area while Luftwaffe simply flew over it.
On the 19th of May 1940 the German 16th Army captured isolated petit ouvrage La Ferté after conducting deliberate assault by combat engineers backed up heavy artillery. The entire French crew of 107 soldiers was killed during action taking fortifications in only four days. On the 14th of June 1940 day Paris fell German 1st Army went offensive in Operation Tiger attacking line between St Avold and Saarbrücken. Infantry divisions of 1st Army attacked fortifications capturing four petits ouvrages. One attack broke through weak section of line in Vosges Mountains but French defenders stopped second attack near Wissembourg. By early June German forces had cut off line from rest of France. Main fortifications remained mostly intact many commanders prepared to hold out. Italian advance had been contained yet Maxime Weygand signed surrender instrument ordering army out of fortifications. When Allied forces invaded in June 1944 line now held by German defenders again largely bypassed. Fighting touched only portions near Metz and northern Alsace toward end of 1944. In January 1945 von Luck with 21st Panzer Division tasked cutting through old Maginot Line defences severing Allied links with Strasbourg. They came against fierce resistance and concentrated American artillery fire withdrawing on the 6th of January 1945.
After the war French re-manned line undertaking some modifications. With advent of French nuclear weapons in early 1960s line became expensive anachronism. Some larger ouvrages converted to command centers. When France withdrew from NATO military component in 1966 much line abandoned. NATO facilities turned back over to French forces rest auctioned off public or left decay. Number old fortifications turned into wine cellars mushroom farms varying degrees success. A few private houses built atop blockhouses. Ouvrage Rochonvillers retained as command center into 1990s deactivated following disappearance Soviet threat. Ouvrage Hochwald only facility main line remains active service hardened command facility for French Air Force known Drachenbronn Airbase. Term Maginot Line part English language America's Maginot Line title used Atlantic article about US military bases Asia. New York Times headlined Maginot Line in Sky 2000 and A New Maginot Line 2001. Canadian singer-songwriter Geoff Berner song called Maginot Line album We Shall Not detailing debacle. Historian Clayton Donnell argued primary purpose prevent concerted attack on France through traditional invasion routes permit time mobilization troops fulfilled.
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Common questions
When did construction of the Maginot Line begin and end?
Construction began in 1930 under the Service Technique du Génie overseen by the Commission d'Organisation des Régions Fortifiées. The main construction was largely completed by 1939 at a cost of around 3 billion French francs.
Why did France build the Maginot Line instead of attacking Germany directly?
French leaders believed they needed Britain's help to win another war against Germany because they had no hope of defeating Germany on its own from 1871. By 1929, the decision to build the line became a tacit admission that Germany would soon rearm while the French economy remained hobbled by World War I reconstruction needs.
How many forts make up the Maginot Line and what are their names?
There are 45 main forts known as grands ouvrages and 97 smaller forts called petits ouvrage. These structures connect over 200 kilometers of tunnels with infrastructure including power-generating units and water storage systems.
What happened during the German attack on the Maginot Line in May 1940?
On the 10th of May 1940 German forces were well into France within five days after violating neutrality of Belgium Luxembourg and Netherlands. They crossed the Meuse river and raced down the Somme valley encircling much of Allied forces in the north leading to the Dunkirk evacuation.
Which specific fortifications fell to German forces in June 1940?
On the 19th of May 1940 the German 16th Army captured isolated petit ouvrage La Ferté after conducting deliberate assault by combat engineers backed up heavy artillery. The entire French crew of 107 soldiers was killed during action taking fortifications in only four days.