The Dyle Plan or Plan D was the plan of the Commander-in-Chief of the
French Army
The French Army, officially known as the Land Army (french: Armée de Terre, ), is the land-based and largest component of the French Armed Forces. It is responsible to the Government of France, along with the other components of the Armed Force ...
,
Maurice Gamelin
Maurice Gustave Gamelin (, 20 September 1872 – 18 April 1958) was an army general in the French Army. Gamelin is remembered for his disastrous command (until 17 May 1940) of the French military during the Battle of France (10 May–22 June 1940 ...
, to defeat a
German
German(s) may refer to:
* Germany (of or related to)
** Germania (historical use)
* Germans, citizens of Germany, people of German ancestry, or native speakers of the German language
** For citizens of Germany, see also German nationality law
**Ge ...
attempt to invade France through Belgium. The
Dyle (Dijle) river is long, from Houtain-le-Val through
Flemish Brabant and
Antwerp; Gamelin intended French, British and Belgian troops to halt a German invasion force along the line of the river. The
Franco-Belgian Accord of 1920
The Franco-Belgian Military Accord of 1920 (french: Accord militaire franco-belge de 1920) was a collective defense pact signed between France and Belgium in September 1920. The Accord was cancelled in 1936 as Belgium returned to pursuing a policy ...
had co-ordinated
communication
Communication (from la, communicare, meaning "to share" or "to be in relation with") is usually defined as the transmission of information. The term may also refer to the message communicated through such transmissions or the field of inqui ...
and
fortification
A fortification is a military construction or building designed for the defense of territories in warfare, and is also used to establish rule in a region during peacetime. The term is derived from Latin ''fortis'' ("strong") and ''facere' ...
efforts of both armies. After the German
Remilitarization of the Rhineland on 7 March 1936, the Belgian government abrogated the accord and substituted a policy of strict
neutrality, now that the German Army () was on the German–Belgian border.
French doubts about the Belgian Army led to uncertainty about whether French troops could move fast enough into Belgium to avoid an encounter battle and fight a defensive battle from prepared positions. The Escaut Plan/Plan E and Dyle Plan/Plan D were devised for a forward defence in Belgium, along with a possible deployment on the French–Belgian border to Dunkirk. Gamelin chose the Escaut Plan, then substituted Plan D for an advance to the line of the Dyle, which was shorter. Some officers at (GQG,
general headquarters
Headquarters (commonly referred to as HQ) denotes the location where most, if not all, of the important functions of an organization are coordinated. In the United States, the corporate headquarters represents the entity at the center or the to ...
of the French Army) doubted that the French could arrive before the Germans.
German dissatisfaction with (Case Yellow), the campaign plan against France, Belgium and the
Netherlands
)
, anthem = ( en, "William of Nassau")
, image_map =
, map_caption =
, subdivision_type = Sovereign state
, subdivision_name = Kingdom of the Netherlands
, established_title = Before independence
, established_date = Spanish Netherl ...
, increased over the winter of 1939–1940. On 10 January 1940, a German aircraft landed at
Maasmechelen
Maasmechelen (; li, Mechele) is a municipality located on the Meuse in the Belgian province of Limburg.
It comprises the former municipalities of Mechelen-aan-de-Maas, Vucht, Leut, Meeswijk, Uikhoven, Eisden, Opgrimbie, Boorsem, and Kotem.
...
in Belgium, carrying plans for the invasion. The
Mechelen Incident
The Mechelen incident of 10 January 1940, also known as the Mechelen affair, took place in Belgium during the Phoney War in the first stages of World War II. A German aircraft with an officer on board carrying the plans for ''Fall Gelb'' (Case Ye ...
was a catalyst for the doubts about and led to the
Manstein Plan
The Manstein Plan or Case Yellow (german: Fall Gelb) also known as Operation Sichelschnitt (german: Sichelschnittplan, from the English language, English term sickle cut), was the Military operation plan, war plan of the German Army (Wehrmacht), ...
, a bold, almost reckless, gamble for an attack further south through the Ardennes. The attack on the
Low Countries
The term Low Countries, also known as the Low Lands ( nl, de Lage Landen, french: les Pays-Bas, lb, déi Niddereg Lännereien) and historically called the Netherlands ( nl, de Nederlanden), Flanders, or Belgica, is a coastal lowland region in N ...
became a decoy to lure the Allied armies northwards, more easily to outflank them from the south.
Over the winter of 1939–1940, Gamelin altered Plan D with the
Breda variant, an advance into the Netherlands to Breda in
North Brabant
North Brabant ( nl, Noord-Brabant ; Brabantian: ; ), also unofficially called Brabant, is a province in the south of the Netherlands. It borders the provinces of South Holland and Gelderland to the north, Limburg to the east, Zeeland to the w ...
. The Seventh Army, the most powerful element of the French strategic reserve, was added to the 1st Army Group close to the coast, to rush to the
Scheldt Estuary
The Scheldt (french: Escaut ; nl, Schelde ) is a river that flows through northern France, western Belgium, and the southwestern part of the Netherlands, with its mouth at the North Sea. Its name is derived from an adjective corresponding to ...
, link with the
Dutch Army
The Royal Netherlands Army ( nl, Koninklijke Landmacht) is the land branch of the Netherlands Armed Forces. Though the Royal Netherlands Army was raised on 9 January 1814, its origins date back to 1572, when the was raised – making the Dutc ...
at
Tilburg
Tilburg () is a city and municipality in the Netherlands, in the southern province of North Brabant. With a population of 222,601 (1 July 2021), it is the second-largest city or municipality in North Brabant after Eindhoven and the seventh-larg ...
or Breda. Some of the best divisions of the French army were moved north, when units of the German Army were being transferred south for the new version of , an invasion through the Ardennes.
Background
French defence policy
![Acier-Louis_Tauzin](https://upload.wikimedia.org/wikipedia/commons/1/12/Acier-Louis_Tauzin.jpg)
After the territorial changes in the
Treaty of Versailles
The Treaty of Versailles (french: Traité de Versailles; german: Versailler Vertrag, ) was the most important of the peace treaties of World War I. It ended the state of war between Germany and the Allied Powers. It was signed on 28 June ...
(28 June 1919) transferred the provinces of
Alsace
Alsace (, ; ; Low Alemannic German/ gsw-FR, Elsàss ; german: Elsass ; la, Alsatia) is a cultural region and a territorial collectivity in eastern France, on the west bank of the upper Rhine next to Germany and Switzerland. In 2020, it had ...
and
Lorraine
Lorraine , also , , ; Lorrain: ''Louréne''; Lorraine Franconian: ''Lottringe''; german: Lothringen ; lb, Loutrengen; nl, Lotharingen is a cultural and historical region in Northeastern France, now located in the administrative region of Gra ...
to France, natural resources, industry and population close to the frontier, vital for the prosecution of another war of exhaustion, meant that the French army would not be able to gain time by retreating into the interior as it had in 1914. By the 1930s, the importance of the two provinces and north-western France to the French economy had grown. The French Army was responsible for frontier protection under the (CSG, Supreme War Council), which was revived on 23 January 1920. By 1922, two schools of thought had emerged, one led by General
Edmond Buat
Edmond Alphonse Léon Buat (17 September 1868 – 30 December 1923) was a general in the French Army, who served as Chief of the Army Staff from 25 January 1920 until his death.
World War I
In World War I, Buat commanded first the 121st Infa ...
that advocated the building of continuous fortifications along the frontier for a relatively static defence and one supported by Marshal
Ferdinand Foch
Ferdinand Foch ( , ; 2 October 1851 – 20 March 1929) was a French general and military theorist who served as the Supreme Allied Commander during the First World War. An aggressive, even reckless commander at the First Marne, Flanders and Ar ...
and Marshal
Philippe Pétain
Henri Philippe Benoni Omer Pétain (24 April 1856 – 23 July 1951), commonly known as Philippe Pétain (, ) or Marshal Pétain (french: Maréchal Pétain), was a French general who attained the position of Marshal of France at the end of Worl ...
, which wanted fortified regions to be built as centres of resistance for offensive action. Armies would manoeuvre around the centres until the most favourable time and conditions for attack. By the end of 1922, majority opinion in the CSG favoured a system that could be used offensively and defensively.
Manpower
By 1918 French conscripts were receiving no more than three months' training and after the war, it was considered that the size of the army should be determined by the number of divisions needed for security. The number of professional soldiers and conscripts necessary was derived by multiplication and the quantity of men was more important than their education or training. In 1920, the CSG decided on 41 active divisions, plus five
Algerian
Algerian may refer to:
* Something of, or related to Algeria
* Algerian people
This article is about the demographic features of the population of Algeria, including population density, ethnicity, education level, health of the populace, econo ...
and three
colonial
Colonial or The Colonial may refer to:
* Colonial, of, relating to, or characteristic of a colony or colony (biology)
Architecture
* American colonial architecture
* French Colonial
* Spanish Colonial architecture
Automobiles
* Colonial (1920 au ...
divisions, with a mobilisation potential of 80 divisions. The government imposed a 32-division limit with 150,000 full-time soldiers but in 1926, the government set the size of the army at 20 active divisions, with 106,000 professional soldiers, to comprise a reservoir of trained men on which reservists could form a mobilised wartime army. Reducing the size of the active army allowed a reduction in the number of conscripts and the term of compulsory service from two years to one year by 1928. In 1928 a comprehensive series of laws had been passed for the recruitment and organisation of the army, which determined its peacetime nature; the cadre of professionals maintained the army ready for the mobilisation of a mass of reservists.
The French army expected that another war would be won by a mass army, even if it was full of short service and sketchily trained men; the period of twelve-month conscription lasted from 1928 until 1935. An army of one-year conscripts was accepted by the army, because a big, fairly well-trained army in wartime was considered more important than a highly trained, quick responding and offensively minded army in peacetime. From 220,000 to 230,000 men were trained each year, half being called up every six months, the previous group moving to the active army as the new men began training. The 106,000-man regular army was capable only of manning frontier defences, training recruits and providing planning staffs; when the garrison in the
Rhineland
The Rhineland (german: Rheinland; french: Rhénanie; nl, Rijnland; ksh, Rhingland; Latinised name: ''Rhenania'') is a loosely defined area of Western Germany along the Rhine, chiefly its middle section.
Term
Historically, the Rhinelands ...
returned, the army lost the capacity for independent or limited action in Europe without mobilisation. In the context of the later 1920s, the decline in the readiness of the standing army did not seem to be a disadvantage. By the time the one-year law affected numbers in 1932, there were 358,000 soldiers in
metropolitan France
Metropolitan France (french: France métropolitaine or ''la Métropole''), also known as European France (french: Territoire européen de la France) is the area of France which is geographically in Europe. This collective name for the European ...
, of whom 232,000 men were sufficiently trained for operations. By 1933, there were 320,000 soldiers in mainland France, with 226,000 having had more than six months' training; the French army was only twice the size of the German , which comprised highly trained soldiers, because of the long term period of service imposed by the treaty of Versailles.
Belgium
![Rhineland](https://upload.wikimedia.org/wikipedia/commons/9/95/Rhineland.jpg)
In September 1920, the CSG made a strategic decision that the defence of the northern frontier must begin with a rush into Belgium. The French army never deviated from the belief that the loss of agricultural, mining and industrial resources could never be repeated. In September, the
Franco-Belgian Accord of 1920
The Franco-Belgian Military Accord of 1920 (french: Accord militaire franco-belge de 1920) was a collective defense pact signed between France and Belgium in September 1920. The Accord was cancelled in 1936 as Belgium returned to pursuing a policy ...
was signed, for military co-operation; if international tension increased, the Belgians would request assistance and the French would send an army to the Belgian-German border, making it the main line of French resistance to a German attack. As the policy was studied, it became clear that a force moving to the Belgo-German border would have to be mobile if it were to forestall the Germans for a defensive battle from prepared positions. Motorised transport would be necessary to rush forward French troops, then ferry engineer stores to fortify the positions. The French army created mobile fortification parks stocked with material for fortification, ready to be moved by road and rail but if the Belgian army was overwhelmed, the French might be forced into an encounter battle and a war of movement in the central Belgian plain. French strategy was to avoid a decisive battle early on, after the disaster of the
Battle of the Frontiers
The Battle of the Frontiers (, , ) comprised battles fought along the eastern frontier of France and in southern Belgium, shortly after the outbreak of the First World War. The battles resolved the military strategies of the French Chief of ...
in 1914 but the necessity of avoiding a war on French soil meant that a forward move could not be avoided.
Maginot Line
![Maginot Linie Karte](https://upload.wikimedia.org/wikipedia/commons/f/f9/Maginot_Linie_Karte.jpg)
Studies made by the General Staff in 1919 were reported to the CSG in 1920 and a commission of 1922, chaired by Marshal
Joseph Joffre
Joseph Jacques Césaire Joffre (12 January 1852 – 3 January 1931) was a French general who served as Commander-in-Chief of French forces on the Western Front from the start of World War I until the end of 1916. He is best known for regroupi ...
reported in December 1925, in favour of centres of resistance built in peacetime, not a continuous fortified front. From 17 December 1926 to 12 October 1927, the Frontier Defence Commission reported to the CSG that fortifications should be built from Metz to Thionville and Longwy, to protect the
Moselle Valley and the mineral resources and industry of Lorraine. The area around the
River Lauter, the most north-eastern part of the common border with Germany, should be fortified as an obvious invasion route but there was no need to fortify the Rhine, because of the Vosges mountains further west and the small number of railways on the German side.
Belfort
Belfort (; archaic german: Beffert/Beffort) is a city in the Bourgogne-Franche-Comté region in Northeastern France, situated between Lyon and Strasbourg, approximately from the France–Switzerland border. It is the prefecture of the Terri ...
was near the
Swiss frontier and partly protected by the Rhine but there was an avenue of invasion to the west, which should be protected. The commission gave emphasis to defence against a surprise attack, with the limited objective of capturing the
Metz
Metz ( , , lat, Divodurum Mediomatricorum, then ) is a city in northeast France located at the confluence of the Moselle and the Seille rivers. Metz is the prefecture of the Moselle department and the seat of the parliament of the Grand ...
and Lauter areas.
The commission recommended that priority be given to protecting the resources and industries of Lorraine that were vital for the French economy and would become more important for a war economy. The nature of fixed defences was debated during the 1920s, with advocates of the offensive use of fortifications, deep or shallow defences and centralised and decentralised designs. On 12 October 1927, the CSG adopted the system recommended by Pétain, of large and elaborately fortified defences from Metz to
Thionville
Thionville (; ; german: Diedenhofen ) is a city in the northeastern French department of Moselle. The city is located on the left bank of the river Moselle, opposite its suburb Yutz.
History
Thionville was settled as early as the time of th ...
and
Longwy
Longwy (; older german: Langich, ; lb, label= Luxemburgish, Lonkech) is a commune in the French department of Meurthe-et-Moselle, Lorraine, administrative region of Grand Est, northeastern France.
The inhabitants are known as ''Longoviciens'' ...
, at Lauter and Belfort, on the north-east frontier, with covered infantry positions between the main fortifications. The
Minister of War
A defence minister or minister of defence is a cabinet official position in charge of a ministry of defense, which regulates the armed forces in sovereign states. The role of a defence minister varies considerably from country to country; in som ...
André Maginot
André Maginot (; 17 February 1877 – 7 January 1932) was a French civil servant, soldier, and Member of Parliament. He is best known for his advocacy of the string of forts known as the Maginot Line.
Early years, to World War I
Maginot was ...
(1922–1924, 1929–1930 and 1931–1932) became the driving force for obtaining the money to fortify the north-eastern frontier, sufficient to resist a German invasion for three weeks, to give time for the French army to mobilise. Work began in 1929 on the (Metz Fortified Region) through the Moselle valley to the Nied at Teting, then the , east of Hagenau from Bitche to the Rhine, the extension of the Metz region to Longuyon and the Lauter region from Bitche to the Sarre at Wittring.
Requirements for the fortifications were natural cover, sites nearby for observation posts, the minimum of dead ground, a maximum arc of fire, ground suitable for anti-tank obstacles and infantry positions and ground on which paved roads could be built, to eliminate wheel marks. were to be built near the frontier as permanently garrisoned works, whose men would alert the army, blow bridges and erect roadblocks, for which materials were dumped. About back were concrete with permanent garrisons armed with intended to delay an attacker so that buried casemates and (fortresses) further back could be manned. Artificial obstacles of 4 to 6 rows of upright railway line, -long set in concrete and of random depth and covered by barbed wire. A barbed wire obstruction further back covered a field of anti-tank mines overlooked by twin machine-guns and anti-tank guns in casemates. The casemates were distributed in series and were the only defensive works along the Rhine; on other stretches, casemates were interspersed with , every . Interval Troops of infantry, gunners, engineers and mechanised light cavalry with field artillery, could manoeuvre between the fortifications, advancing to defend casemate approaches to relieve outposts or retiring to protect fortress entrances; the troops provided continuity, depth and mobility to the static defences.
Ardennes
![Ardennen03](https://upload.wikimedia.org/wikipedia/commons/2/20/Ardennen03.png)
The Ardennes was considered to be easily defended and in 1927, the
Guillaumat Commission concluded that the few narrow serpentine roads, through wooded hills could be blocked easily with felled trees, minefields and roadblocks. The swift advance of a large force, particularly a road-bound one, through natural and artificial obstacles, could be easily made slow and arduous. Once an invader managed to get through the Ardennes, the depth and width of the river Meuse made it a considerable obstacle. The resources and equipment needed to use the Ardennes route would take so long that the French army expected to have ample time to reinforce the area. During the 1930s, the possibility of an attack through the Ardennes was re-considered and in 1934, Pétain called the area "not dangerous" and in 1936, Gamelin and the Belgian chief of staff General Cumont, the Ardennes were not vulnerable if the French held the
Arlon
Arlon (; lb, Arel ; nl, Aarlen ; german: Arel ; wa, Årlon; la, Orolaunum) is a city and municipality of Wallonia located in and capital of the province of Luxembourg in the Ardennes, Belgium. With a population of just over 28,000, it is th ...
shoulder and the Belgians the opposite one at
Liège. Compared to the terrain and resources behind the north-eastern border and the lack of defensible ground on the northern frontier, the connecting ground of the Ardennes was less vulnerable to attack.
Northern border
![Maginot Line ln-en](https://upload.wikimedia.org/wikipedia/commons/b/b2/Maginot_Line-en.svg)
The CSG considered the defence of the frontier from Luxembourg to Dunkirk to be the most difficult and inseparable from the defence of the north-east border with Germany. Fortifying the north-eastern frontier would economise on troops, allowing a larger force to operate on the northern border with Belgium. In the north, the flat and open country on the Franco-Belgian border would need far more extensive fortification than the hill country of Alsace and Lorraine and the high
water table
The water table is the upper surface of the zone of saturation. The zone of saturation is where the pores and fractures of the ground are saturated with water. It can also be simply explained as the depth below which the ground is saturated.
T ...
would mean that defences would have to be built upwards rather than dug down. A fortified defence in depth would be impractical because the industrial
conurbation of
Lille
Lille ( , ; nl, Rijsel ; pcd, Lile; vls, Rysel) is a city in the northern part of France, in French Flanders. On the river Deûle, near France's border with Belgium, it is the capital of the Hauts-de-France region, the prefecture of the N ...
,
Tourcoing
Tourcoing (; nl, Toerkonje ; vls, Terkoeje; pcd, Tourco) is a city in northern France on the Belgian border. It is designated municipally as a commune within the department of Nord. Located to the north-northeast of Lille, adjacent to Roubai ...
,
Roubaix
Roubaix ( or ; nl, Robaais; vls, Roboais) is a city in northern France, located in the Lille metropolitan area on the Belgian border. It is a historically mono-industrial commune in the Nord department, which grew rapidly in the 19th century ...
and
Valenciennes
Valenciennes (, also , , ; nl, label=also Dutch, Valencijn; pcd, Valincyinnes or ; la, Valentianae) is a commune in the Nord department, Hauts-de-France, France.
It lies on the Scheldt () river. Although the city and region experienced a ...
and its railway communications, obstructed the construction of a prepared battlefield with barbed wire, trenches and tank traps. Along with the lack of geographical obstacles, there were many roads and railways straight to Paris. Fortifying the frontier might also create doubts about French intentions among the Belgians, when the Belgian route was the obvious avenue of invasion, pointing at Paris. From May 1920, the CSG considered Belgium the main route of a possible invasion, particularly as the fortification of the north-eastern frontier would deprive German planners of an alternative and force them into a version of the 1914 invasion.
Prelude
Escaut Plan/Plan E, 1939–1940
On the French declaration of war on 3 September 1939, French military strategy had been settled, taking in analysis of geography, resources and manpower. The French army would defend on the right and advance into Belgium on the left, to fight forward of the French frontier. The extent of the forward move was dependent on events, which were complicated in 1936 by the Belgian repudiation of the accord of 1920. The Belgian declaration of neutrality made the Belgian government reluctant to co-operate openly with France but it did communicate information on Belgian defences. By May 1940, there had been an exchange of the general nature of French and Belgian defence plans but little co-ordination, especially against a German offensive, westwards through Luxembourg and the east of Belgium. The French expected Germany to breach Belgian neutrality first, thus providing a pretext for French intervention or for the Belgians to request support when an invasion was imminent. Most of the French mobile forces were assembled along the Belgian border, ready to make a quick move forward and take up defensive positions before the Germans arrived.
An early appeal for help might give the French time to reach the German–Belgian frontier but there were three feasible defensive lines further back. There was a practicable line from
Givet
Givet () (german: Gibet Walloon: ''Djivet'') is a commune in the Ardennes department in northern France surrounded on three sides by the Belgian border.
It lies on the river Meuse where Emperor Charles V built the fortress of Charlemont. It ...
, to
Namur, across the
Gembloux Gap
The Battle of Gembloux (or Battle of the Gembloux Gap) was fought between French and German forces in May 1940 during the World War II, Second World War. On 10 May 1940, The Nazi ''Wehrmacht'', invaded German invasion of Luxembourg in World War ...
(),
Wavre
Wavre (; nl, Waver, ; wa, Wåve) is a city and municipality of Wallonia, capital of the province of Walloon Brabant, Belgium.
Wavre is in the Dyle valley. Most inhabitants speak French as their mother tongue and are called "Wavriens" and " ...
,
Louvain
Leuven (, ) or Louvain (, , ; german: link=no, Löwen ) is the capital and largest city of the province of Flemish Brabant in the Flemish Region of Belgium. It is located about east of Brussels. The municipality itself comprises the historic c ...
and along the Dyle river to
Antwerp, later termed Dyle Plan/Plan D, which could be reached and was shorter than the alternatives. A second possibility was a line from the French border to
Condé,
Tournai, along the Escaut (
Scheldt
The Scheldt (french: Escaut ; nl, Schelde ) is a river that flows through northern France, western Belgium, and the southwestern part of the Netherlands, with its mouth at the North Sea. Its name is derived from an adjective corresponding to ...
) to
Ghent
Ghent ( nl, Gent ; french: Gand ; traditional English: Gaunt) is a city and a municipality in the Flemish Region of Belgium. It is the capital and largest city of the East Flanders province, and the third largest in the country, exceeded i ...
and thence to
Zeebrugge
Zeebrugge (, from: ''Brugge aan zee'' meaning "Bruges at Sea", french: Zeebruges) is a village on the coast of Belgium and a subdivision of Bruges, for which it is the modern port. Zeebrugge serves as both the international port of Bruges-Zee ...
on the
North Sea
The North Sea lies between Great Britain, Norway, Denmark, Germany, the Netherlands and Belgium. An epeiric sea, epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the ...
coast, possibly further along the Scheldt (Escaut) to Antwerp, which became Escaut Plan/Plan E. The third potential defensive line was along field defences along the French border from Luxembourg to
Dunkirk. For the first fortnight of the war,
Maurice Gamelin
Maurice Gustave Gamelin (, 20 September 1872 – 18 April 1958) was an army general in the French Army. Gamelin is remembered for his disastrous command (until 17 May 1940) of the French military during the Battle of France (10 May–22 June 1940 ...
,
General of the army and
Commander-in-chief of the
French Armed Forces, favoured Plan E because of the example of the fast German advances in Poland after the invasion of 1 September 1939. Gamelin and the other French commanders doubted that they could advance any further forward before the Germans arrived and in late September, Gamelin issued General
Gaston Billotte
Gaston-Henri Billotte (10 February 1875 – 23 May 1940) was a French military officer, remembered chiefly for his central role in the failure of the French Army to defeat the German invasion of France in May 1940. He was killed in a car accident ...
, the commander of the 1st Army Group, a directive for
The 1st Army Group had permission to enter Belgium and deploy along the Escaut, according to Plan E. On 24 October, Gamelin directed that an advance beyond the Escaut could not succeed unless the French moved fast enough to forestall the Germans.
Allied intelligence
By October 1939, the Germans had prepared (Case Yellow) for an offensive in the west over the Belgian plain. The intention was to inflict a huge defeat on the Allies and occupy as much of the Netherlands, Belgium and northern France as possible; to conduct an air war against Britain and to protect the Ruhr against an Allied invasion of Germany. Several times in the winter, Hitler ordered the plan to be implemented, with several tip-offs reaching the Allies through agents and
Ultra
adopted by British military intelligence in June 1941 for wartime signals intelligence obtained by breaking high-level encrypted enemy radio and teleprinter communications at the Government Code and Cypher School (GC&CS) at Bletchley Park. ' ...
signals intelligence. A warning that the German offensive would begin on 12 November was received from various sources, with the main panzer effort to be made against the
Low Countries
The term Low Countries, also known as the Low Lands ( nl, de Lage Landen, french: les Pays-Bas, lb, déi Niddereg Lännereien) and historically called the Netherlands ( nl, de Nederlanden), Flanders, or Belgica, is a coastal lowland region in N ...
(Belgium and the Netherlands) and the Allied forces were alerted. It was later discovered that
Adolf Hitler
Adolf Hitler (; 20 April 188930 April 1945) was an Austrian-born German politician who was dictator of Nazi Germany, Germany from 1933 until Death of Adolf Hitler, his death in 1945. Adolf Hitler's rise to power, He rose to power as the le ...
, the
Wehrmacht
The ''Wehrmacht'' (, ) were the unified armed forces of Nazi Germany from 1935 to 1945. It consisted of the ''Heer'' (army), the '' Kriegsmarine'' (navy) and the ''Luftwaffe'' (air force). The designation "''Wehrmacht''" replaced the previo ...
commander-in-chief, had been ordered to a state of readiness on 5 November but cancelled it on 7 November. Several other German alerts eluded Allied military intelligence and the German invasion of Denmark and Norway took the Allies by surprise. An agent reported that the German invasion in the west was set for mid-December and was received from a Czech source in the (German military intelligence); another Allied alert was called after reports that the attack would begin on 13 January. Hitler ordered the attack on 17 January and then postponed it again. French and British intelligence were certain that the Germans could begin an invasion quickly and that there would be little time, after the first German move forward, to discover the time and the place.
Mechelen incident
On 10 January 1940 a German aircraft made a forced landing near
Maasmechelen
Maasmechelen (; li, Mechele) is a municipality located on the Meuse in the Belgian province of Limburg.
It comprises the former municipalities of Mechelen-aan-de-Maas, Vucht, Leut, Meeswijk, Uikhoven, Eisden, Opgrimbie, Boorsem, and Kotem.
...
(Mechelen), Belgium. The aircraft carried an officer passenger, carrying the
Luftwaffe
The ''Luftwaffe'' () was the aerial-warfare branch of the German ''Wehrmacht'' before and during World War II. Germany's military air arms during World War I, the ''Luftstreitkräfte'' of the Imperial Army and the '' Marine-Fliegerabtei ...
's plans for an offensive through central Belgium to the North Sea. The documents were seized by the Belgian authorities and passed on to Allied intelligence, but they were thought to be a plant. In the April full moon period, another Allied alert was called in case of an attack on the Low Countries or only the Netherlands, an offensive through the Low Countries, outflanking the Maginot Line from the north, an attack on the Maginot Line or an invasion through Switzerland. No contingency anticipated a German attack through the Ardennes. The Germans assumed that the captured documents had reinforced the Allied appreciation of their intentions, and on 30 January, some details of N°3, were amended. On 24 February, the main German effort was moved south to the Ardennes. Twenty divisions (including seven panzer and three motorised) were transferred from
''Heeresgruppe'' B (Army Group B) opposite The Netherlands and Belgium to
''Heeresgruppe'' A (Army Group A) facing the Ardennes. French intelligence uncovered a transfer of German divisions from the Saar to the north of the Moselle but failed to detect the redeployment from the Dutch border to the
Eiffel
Eiffel may refer to:
Places
* Eiffel Peak, a summit in Alberta, Canada
* Champ de Mars – Tour Eiffel station, Paris, France; a transit station
Structures
* Eiffel Tower, in Paris, France, designed by Gustave Eiffel
* Eiffel Bridge, Ungheni, M ...
–
Moselle area.
Dyle Plan/Plan D, 1940
By late 1939, the Belgians had improved the defences along the
Albert Canal
The Albert Canal (, ) is a canal located in northeastern Belgium, which was named for King Albert I of Belgium. The Albert Canal connects Antwerp with Liège, and also the Meuse river with the Scheldt river. It also connects with the Dessel ...
and increased the readiness of the army; Gamelin and GQG began to consider the possibility of advancing further than the Escaut. By November, GQG had decided that a defence along the Dyle Line was feasible, despite the doubts of General
Alphonse Georges
Alphonse Joseph Georges (August 15, 1875 in Allier - Montluçon – April 24, 1951 in Paris) was a French army officer. He was commander in chief of the North East Front in 1939 and 1940. Opposing the plan by supreme commander Maurice Gamelin to ...
, the commander of the North-Eastern Front, about reaching the Dyle before the Germans. The British had been lukewarm about an advance into Belgium, but Gamelin talked them round, and on 9 November, the Dyle Plan was adopted. On 17 November, a session of the
Supreme War Council decided that it was essential to occupy the Dyle Line, and Gamelin issued a directive that day detailing a line from Givet to Namur, the Gembloux Gap, Wavre, Louvain and Antwerp. For the next four months, the Dutch and Belgian armies laboured over their defences, the
British Expeditionary Force (BEF, General
Lord Gort
Field Marshal John Standish Surtees Prendergast Vereker, 6th Viscount Gort, (10 July 1886 – 31 March 1946) was a senior British Army officer. As a young officer during the First World War, he was decorated with the Victoria Cross for his acti ...
) expanded, and the French army received more equipment and training.
In May 1940, the 1st Army Group was responsible for the defence of France from the Channel coast to the west end of the Maginot Line. The
Seventh Army (
Henri Giraud
Henri Honoré Giraud (18 January 1879 – 11 March 1949) was a French general and a leader of the Free French Forces during the Second World War until he was forced to retire in 1944.
Born to an Alsatian family in Paris, Giraud graduated from ...
), BEF, First Army (
Georges Maurice Jean Blanchard Georges Blanchard (1877–1954) was a French military officer. He served in the French Army in World War I on the Western Front. In World War II, he was a general, commanding the French First Army, which advanced into Belgium during the Battle of Be ...
) and Ninth Army (
André Corap
André Georges Corap (, 15 January 1878 – 15 August 1953) was a General in the French Army who fought in World War II. He commanded the 9th Army during the battle of France in 1940.
Early life
Corap was born in Pont Audemer, Normandy. His fat ...
) were ready to advance to the Dyle Line by pivoting on the right (southern) Second Army. The Seventh Army would take over west of Antwerp, ready to move into the Netherlands, and the Belgians were expected to delay a German advance at the Albert Canal and then retire to the Dyle, from Antwerp to Louvain. On the Belgian right, the BEF was to defend about of the Dyle from Louvain to Wavre with nine divisions and the First Army on the right of the BEF was to hold with ten divisions, from Wavre across the Gembloux Gap to Namur. The gap from the Dyle to Namur north of the Sambre, with Maastricht and Mons on either side, had few natural obstacles and was a traditional route of invasion, leading straight to Paris.
The Ninth Army would take post south of Namur, along the Meuse to the left (northern) flank of the Second Army, which was the right (eastern) flank army of the 1st Army Group, holding the line from
Pont à Bar
Dom-le-Mesnil () is a commune in the Ardennes department in northern France.
Population
See also
*Communes of the Ardennes department
The following is a list of the 449 communes of the Ardennes department of France.
The communes coop ...
west of Sedan to
Longuyon
Longuyon () is a commune in the Meurthe-et-Moselle department in the Grand Est region of north-eastern France. The inhabitants are called ''Longuyonnais''.
Geography
Longuyon is located at the confluence of the Chiers and Crusnes rivers and ...
. GQG considered that the Second and Ninth armies had the easiest task of the army group since they were dug in on the west bank of the Meuse on ground that was easily defended and behind the Ardennes and would have plenty of warning of a German attack in the centre of the French front. After the transfer of the Seventh Army to the 1st Army Group, seven divisions remained behind the Second and Ninth armies and other divisions could be moved from behind the Maginot Line. All but one division were either side of the junction of the two armies, GQG being more concerned about a possible German attack past the north end of the Maginot Line and then south-east through the Stenay Gap for which the divisions behind the Second Army were well placed.
Breda variant
If the Allies could control the Scheldt Estuary, supplies could be transported to Antwerp by ship and contact established with the Dutch army along the river. On 8 November, Gamelin directed that a German invasion of the Netherlands must not be allowed to pass round the west of Antwerp by gaining the south bank of the Scheldt. The left flank of the 1st Army Group was reinforced by the Seventh Army, containing some of the best and most mobile French divisions, which moved from the general reserve by December. The role of the army was to occupy the south bank of the Scheldt, to be ready to move into Holland and protect the estuary, by holding the north bank along the Beveland Peninsula (now the
Walcheren
Walcheren () is a region and former island in the Dutch province of Zeeland at the mouth of the Scheldt estuary. It lies between the Eastern Scheldt in the north and the Western Scheldt in the south and is roughly the shape of a rhombus. The two ...
–
Zuid-Beveland
Zuid-Beveland (; "South Beveland") is part of the province of Zeeland in the Netherlands north of the Western Scheldt and south of the Eastern Scheldt.
Topography
It is a former island, now peninsula, crossed by the Canal through Zuid-Bevel ...
–Noord-Beveland
peninsula) in the "Holland Hypothesis". On 12 March 1940, Gamelin discounted dissenting opinions at GQG and decided that the Seventh Army would advance as far as Breda, to link with the Dutch. Georges was told that the Seventh Army role on the left flank of the Dyle manoeuvre would be linked to it and Georges notified Billotte that if it were ordered to cross into the Netherlands, the left flank of the army group was to advance to
Tilburg
Tilburg () is a city and municipality in the Netherlands, in the southern province of North Brabant. With a population of 222,601 (1 July 2021), it is the second-largest city or municipality in North Brabant after Eindhoven and the seventh-larg ...
if possible and certainly to Breda. The Seventh Army was to take post between the Belgian and Dutch armies, by passing the Belgians along the Albert Canal and then turning east, a distance of , against German armies only distant from Breda. On 16 April, Gamelin also made provision for a German invasion of only the Netherlands by changing the area to be reached by the Seventh Army. The Escaut Plan was to be followed only if the Germans forestalled the French move into Belgium.
Battle
Dyle Plan, 10–20 May 1940
1st Army Group
![Bundesarchiv Bild 146-1981-070-15, Frankreich, Panzer IV](https://upload.wikimedia.org/wikipedia/commons/6/6b/Bundesarchiv_Bild_146-1981-070-15%2C_Frankreich%2C_Panzer_IV.jpg)
From GQG received information from Brussels and Luxembourg, that the German invasion was about to begin and at the invasion of France and the Low Countries commenced. Gamelin was woken at and ordered the Dyle Plan to start. Around dawn on 10 May, German bombers attacked targets in the Netherlands and began to drop parachutists onto airfields. Dutch, French and British aircraft attacked the on the ground and in the air but several airfields were captured. The French Seventh Army drove forward on the northern flank and advanced elements reached Breda on 11 May, by when, the Germans had captured the north-eastern frontier provinces of the Netherlands, were advancing on
The Hague
The Hague ( ; nl, Den Haag or ) is a city and municipality of the Netherlands, situated on the west coast facing the North Sea. The Hague is the country's administrative centre and its seat of government, and while the official capital o ...
() and fighting in Rotterdam. The French found that the
Moerdijk
Moerdijk () is a municipality and a town in the South of the Netherlands, in the province of North Brabant.
History
The municipality of Moerdijk was founded in 1997 following the merger of the municipalities of Fijnaart en Heijningen, Klundert ...
causeway had been captured by German paratroops, cutting the link between southern and northern Holland, forcing the Dutch Army to retire north towards Amsterdam and Rotterdam. The French collided with the 9th Panzer Division and the advance of the 25th Motorised Infantry Division (
25e ''Division d'Infanterie Motorisée'') was stopped by German infantry, tanks and
Junkers Ju 87 dive-bombers.
The
1e ''Division Légère Mécanisée'' (1st Mechanised Light Division) was forced to retreat as the French heavy tanks were still on trains south of Antwerp. The Breda variant had been thwarted in fewer than two days and on 12 May, Gamelin ordered the Seventh Army to cancel the plan and cover Antwerp, retiring from the Bergen op Zoom–Turnhout Canal Line from Antwerp, to Lierre away. On 13 May, more German forces were landed at Den Haag and Rotterdam, the German army broke through the Dutch at Wageningen on the north side of the Waal and pushed the French Seventh Army back from Breda to Herentals and Bergen op Zoom, where they were met by Belgian troops retreating from Turnhout. By 14 May, much of the Netherlands had been overrun and the Seventh Army found that fighting in the close country among the canals of southern Holland and north-western Belgium proved costly against the German combination of ground and air attack. Next day, Dutch resistance continued in Zeeland as German troops advanced in South Beveland and Walcheren but the government surrendered at Two divisions of the Seventh Army remained to hold Zeeland and two held Antwerp as the rest of the army retreated to the south. On 15 May, the rest of the Seventh Army retreated from South Beveland under attack from the and the Belgian army prepared to retire through Antwerp to hold the Scheldt Estuary and a line south along the Willebrook Canal to Brussels. The Seventh Army kept three divisions on the south side of the Scheldt Estuary on 17 May and the Belgians began to retreat from Antwerp towards the Scheldt; Brussels and Mechelen fell to the Germans that evening.
![Barrière Cointet St Côme du mont](https://upload.wikimedia.org/wikipedia/commons/7/79/Barri%C3%A8re_Cointet_St_C%C3%B4me_du_mont.jpg)
In Belgium, the Albert Canal defence line was based on the fortress of Eben-Emael; German attacks began at dawn, dive-bombers and paratroops attacking the fort. By noon on 11 May, the German glider troops on the roof of Eben-Emael, had forced the garrison to surrender and two bridges over the Maas (Meuse) at Vroenhoven and Veldwezelt near Maastricht were captured. The disaster forced the Belgian Army to retreat towards the line from Antwerp to Louvain on 12 May, far too soon for the French First Army to arrive and dig in. The French had reached the Gembloux Gap on 11 May and officers reported that the area had been far less fortified by the Belgians than expected. Anti-tank defences had not been built and there were no trenches or concrete fortifications; there were some
Cointet-element
The Cointet-element, also known as a Belgian Gate or C-element, was a heavy steel fence about wide and high, typically mounted on concrete rollers, used as a mobile anti-tank obstacle during World War II. Each individual fence element weighed ...
s (steel barriers) but none of the anti-tank mines supposed to protect them. Some of the Cointet-elements were so poorly sited that a French officer wondered if the Germans had been asked where to put them. Prioux tried to persuade Billotte and Georges to scrap the Dyle Plan and revert to the Escaut Plan but with the 1st Army Group on the move, Georges decided against changing the plan; Blanchard was ordered to accelerate the advance of the First Army to arrive on 14 May, a day early.
The made contact with the Germans at and fought a delaying action against the XVI Panzer Corps in the
Battle of Hannut
The Battle of Hannut was a Second World War battle fought during the Battle of Belgium which took place between 12 and 14 May 1940 at Hannut in Belgium. It was the largest tank battle in the campaign. It was also the largest clash of tanks in ar ...
Hannut was the first tank-against-tank encounter of the campaign and the French proved superior to the German tanks in firepower and armour protection. The then withdrew behind the First Army, which had arrived at the Dyle Line. The corps had casualties against tanks knocked out but the French left their damaged tanks behind; the Germans were able to repair Belgian troops were retiring to the area between Louvain and Antwerp, filling the gap between the BEF and the Seventh Army; there was a lull along the Belgian army positions from Wijnegem to Lier and Louvain and the front held by the BEF. South of the BEF, the French First Army tried to dig in from Wavre to Gembloux and Namur but closer to the Belgian–French frontier to the south, the Germans got across the Maas (Meuse) at Houx and from Douzy to Vrigne-sur-Meuse in France. On 15 May, the BEF counter-attacked at Louvain and the Germans attacked the First Army along the Dyle, causing the
meeting engagement
In warfare, a meeting engagement, or encounter battle, is a combat action that occurs when a moving force, incompletely deployed for battle, engages an enemy at an unexpected time and place.
Description
Such encounters normally occur by chance i ...
that Gamelin had tried to avoid. The First Army repulsed the XVI Panzer Corps during the
Battle of Gembloux (14–15 May), which had followed the Battle of Hannut but GQG realised that the main German attack had come further south, through the Ardennes.
The First Army began a retirement towards Charleroi, because the French success in Belgium was contributing to the disaster on the Meuse at Sedan and on 16 May, Blanchard was ordered to retreat to the French border. The British also began to retreat to the Escaut and the First Army was pushed back closer to the Charleroi–Brussels Canal. Next day, parts of the BEF began to retreat towards the Dender river as the British reorganised to face the threat on their right flank against the Germans who had broken through south of the First Army. The First Army retreated to a line from Ath, southwards to Lens to link with the remainder of the Ninth Army at Mons; only exiguous forces remained between Maubeuge and Attigny. Allied forces in Belgium continued the retreat on 18 May to the Escaut and towards the French border further south. The Germans followed up the Allied retreat on Sunday 19 May but made a much greater effort in the south from the Meuse, along the Somme river valley, towards the Channel coast. Parts of the Seventh Army began to assemble from Péronne along the Somme and Ailette rivers, across the Oise to Coucy-le-Chateau.
Ardennes
![Char 1935 S Somua 1](https://upload.wikimedia.org/wikipedia/commons/0/01/Char_1935_S_Somua_1.jpg)
German troops were flown to the Belgian Ardennes to capture road junctions and other German troops advanced into Luxembourg as five panzer divisions of advanced through the Ardennes. XIX Panzer Corps with three panzer divisions on the southern flank towards Sedan against the Second Army and the XLI Panzer Corps with two panzer divisions on the northern flank, towards Monthermé against the Ninth Army. The XV Corps moved through the upper Ardennes with two panzer divisions towards Dinant as a flank guard against a counter-attack from the north. From the XIX Panzer Corps engaged the two cavalry divisions of the Second Army, surprised them with a far larger force than expected and forced the French back. The Ninth Army to the north had also sent its two cavalry divisions forward, which were withdrawn on 12 May before they met German troops. Corap needed the cavalry divisions to reinforce the defences on the Meuse, because some of the infantry had not arrived. The most advanced German units reached the Meuse in the afternoon but the local French commanders thought that they were far ahead of the main body and would wait before trying to cross the Meuse.
![10May 16May Battle of Belgium](https://upload.wikimedia.org/wikipedia/commons/2/2b/10May_16May_Battle_of_Belgium.PNG)
From 10 May, Allied bombers had been sent to raid northern Belgium to delay the German advance while the First Army moved up; attacks on the bridges at Maastricht had been costly failures, day bombers being reduced to aircraft by 12 May. Georges changed air force priority from the First to the Second Army on 12 May but Billotte only diverted a third of the air effort. Georges also began to reinforce the Second Army by ordering the
3e ''Division Cuirassée'' (DCr, reserve armoured division) and five other divisions from the general reserve but with no urgency. The reinforcements moved as transport arrived from and were positioned to stop a German wheel to the south-east, against the rear of the Maginot Line. Despite the precautions taken against a German attack through the Ardennes, Georges and Gamelin remained more concerned about events in Belgium and on 13 May, when the Germans were across the Meuse at three points, GQG reported that it was too soon to predict the main German attack. At on 13 May, the began bombing the French defences around Sedan and continued for eight hours with about the biggest air attack in history.
![16May-21May Battle of Belgium](https://upload.wikimedia.org/wikipedia/commons/b/b5/16May-21May_Battle_of_Belgium.PNG)
Little material damage was done to the Second Army but morale collapsed. In the French 55e Division at Sedan, some troops began to straggle to the rear; in the evening panic spread through the division. German troops attacked across the river at and had gained three footholds on the west bank by nightfall. The French and the RAF managed to fly and sorties on the Sedan bridges on 14 May but only in formations of The attackers suffered a loss of 11 percent, the RAF losing aircraft and the French being reduced to sending obsolete bombers to attack in the afternoon, also with many losses. The
1e DCr, which had been intended to form part of the First Army reserve, was sent to
Charleroi at the north side of the German salient on 10 May. Billotte was still unsure of the main German effort and hesitated to direct it to the Ninth Army until 14 May; the order took until the afternoon to arrive and the march was obstructed by refugees on the roads. When the
4th
Fourth or the fourth may refer to:
* the ordinal form of the number 4
* ''Fourth'' (album), by Soft Machine, 1971
* Fourth (angle), an ancient astronomical subdivision
* Fourth (music), a musical interval
* ''The Fourth'' (1972 film), a Sovie ...
(DINA, North African Infantry Division) counter-attacked that day, 1e DCr was still struggling forward and was caught refuelling by the
7th Panzer Division.
The 1e DCr knocked out about but was defeated in detail and ceased to exist as a division. The Ninth Army had been bypassed on both flanks and was ordered to retreat from the Meuse to a line from Charleroi to
Rethel
Rethel () is a commune in the Ardennes department in northern France. It is a sub-prefecture and third-most important city and economic center in the department. It is situated on the river Aisne, near the northern border of Champagne and 37 ...
. The French held on to the Meuse about south of Namur but the German crossings of the Meuse further south from Dinant to Stenay continued with a swift advance past Mézières. On the south side of the German salient, on the right flank of the Second Army, it took until 15 May for the
3e DCr to attack at
Stonne and again the attacks were piecemeal, lasting for several days but having only local effect. On 16 May, the Germans reached Hirson and pushed beyond Montcornet towards Laon, with little opposition to the advances westwards. The 1st Army Group was ordered to retreat from the Dyle Line, to avoid being trapped by the German breakthrough against the Second and Ninth armies. A defensive line was to be created from Maubeuge along the Sambre and Oise but German troops got across the Sambre at Landrecies and the Oise at several points on 18 May and by evening had reached St Quentin and advanced towards Cambrai, which fell on 19 May, followed by Amiens on 20 May. The Germans reached
Abbeville
Abbeville (, vls, Abbekerke, pcd, Advile) is a commune in the Somme department and in Hauts-de-France region in northern France.
It is the chef-lieu of one of the arrondissements of Somme. Located on the river Somme, it was the capital of ...
on the Channel coast and closed on Montreuil and Boulogne, cutting off the northern armies.
Aftermath
Analysis
By choosing the Dyle Plan and imposing the Breda variant, Gamelin completed the evolution of army planning for the defence of France that began in 1920. Staff studies of the Breda variant caused some senior French generals to question the plan; Georges requested that the Seventh Army be replaced by two divisions and returned to the General Reserve and warned against sending the bulk of the French mobile forces against an attack on the northern flank that was a diversion for a German attack through the centre. Doughty wrote that Gamelin gained confidence in the capacity of the Allied armies, adopting a grand strategy of dubious value over the objections of some of the most senior French generals. For control of the Scheldt Estuary and the possibility of adding ten Dutch divisions to the Allied order of battle, Gamelin committed the best divisions of the General Reserve, leaving little to confront a German surprise. Gamelin imposed the Breda variant unilaterally, without consultation with the governments of Belgium and the Netherlands, which refused to make detailed arrangements for joint military action, unless invaded.
Gamelin was an officer who had risen through the French military hierarchy with a reputation for caution, yet he took a great gamble with the Dyle Plan, which was not inherently reckless until the Breda variant. Doughty wrote that had the Germans been aware of the French plan, it would have greatly relieved them of apprehensions about their huge gamble in the Ardennes. Some of the best French divisions were wasted on the Breda variant, leaving few reserves from the Rhine to the Channel, the best divisions on the flanks, leaving France vulnerable to an attack through the centre. Georges was responsible for the placement of the divisions behind the 1st Army Group but Gamelin devised the Breda variant and forced it on some reluctant subordinates. The Dyle Plan was laid down in thick document volumes for each headquarters, Prioux complaining of "enormous dossiers...full of corrections, additions, annexes, appendices, etc". Motorised units in the Seventh and First armies had orders for vehicle speeds, distances to be maintained and the formalities to be observed with the Belgian authorities. Had the divisions followed their instructions, the rapid deployment to the Dyle Line would have been reduced to per day.
Hannut
At the Battle of Hannut, the 2nd and 3rd DLM of the with 239 Hotchkiss light tanks and 176 Somua S35s had faced the 3rd Panzer Division with 280 tanks and the 4th Panzer Division with 343 tanks. The German units had only 73 Panzer III and 52 Panzer IV, while the French also had 90
Panhard 178
The Panhard 178 (officially designated as ''Automitrailleuse de Découverte Panhard modèle 1935'', 178 being the internal project number at Panhard) or "Pan-Pan" was an advanced French reconnaissance 4x4 armoured car that was designed for the ...
armoured cars, carrying
25 mm SA 35 anti-tank guns, capable of penetrating any German panzer. The
37 mm gun carried by the Panzer III was ineffective against the French tanks and the
75 mm KwK 37 of the Panzer IV could only penetrate a Somua at close-range. By fighting on the defensive, the French tanks also had the advantage of hiding in villages and engaging from cover. A lack of operational radios was a tactical disadvantage and a report from Panzer Regiment 35 called the French "leaderless, aimless, poorly-led and tactically inferior". The French still managed to inflict a considerable number of tank casualties on the Germans at Hannut (and later at Gembloux), the 4th Panzer Division being reduced to 137 operational tanks on 16 May with only four Panzer IV, a reduction of 45–50 per cent. The 3rd Panzer Division lost 20–25 per cent and despite the lightly damaged tanks being quickly repaired, the fighting power of the XVI Panzer Corps was substantially reduced.
The Battle of Hannut was a French
tactical success, the stand of the providing time for the rest of the First Army to dig on the Dyle Line by the fifth day of operations (14 May); the German attack on the Dyle Line could not be organised in any strength until the sixth day (15 May). At the
operational level of war
In the field of military theory, the operational level of war (also called operational art, as derived from russian: оперативное искусство, or operational warfare) represents the level of command that connects the details of ...
, that the Battle of Hannut had been fought at all was a big success for the German decoy operation in central Belgium, which made the French victory irrelevant in the context of the campaign. The , with its organisation and equipment, would have been invaluable for a counter-attack against the German divisions over the Meuse at Sedan. When local French counter-attacks at Sedan failed on 14 May, Gamelin contemplated ordering the to counter-attack southwards but the XVI Panzer Corps and the had inflicted such losses that the corps was incapable of such a manoeuvre. With no forces available against the penetration at Sedan, the XVI Panzer Corps was no longer needed for the
feint
Feint is a French term that entered English via the discipline of swordsmanship and fencing. Feints are maneuvers designed to distract or mislead, done by giving the impression that a certain maneuver will take place, while in fact another, or e ...
in Belgium and was transferred to (Army Group A) on 18 May.
Gallery
File:German losses after WWI.svg, German territorial losses after the Treaty of Versailles
File:MapMeuse1.jpg, Map showing the course of the Meuse
File:Meuse, in the french ardennes.JPG, View of the Meuse
The Meuse ( , , , ; wa, Moûze ) or Maas ( , ; li, Maos or ) is a major European river, rising in France and flowing through Belgium and the Netherlands before draining into the North Sea from the Rhine–Meuse–Scheldt delta. It has a t ...
in the French Ardennes
File:Schelde Relief (de).svg, Relief map showing the Escaut/Scheldt river
Image:KaartDijle.jpg, Diagram of the course of the Dyle (Dijle) river
File:LocationAlbertcanal.PNG, Diagram of the course of the Albert Canal
File:Map provinces Netherlands-en.svg, Map of the Netherlands, showing Breda in North Brabant
Notes
Footnotes
References
*
*
*
*
*
*
*
*
*
Further reading
Books
*
*
*
*
*
*
*
*
Journals
*
*
*
*
*
*
Theses
*
External links
France, 1940: Armée de l'Air order of battle, 10 May 1940Nafziger: French order of battle, 10 May 1940French army order of battle 21 August 1939 – 5 June 1940Nafziger: Organization of a Belgian ''Chasseur d'Ardennes'' Division, 10 May 1940Nafziger: Organization of a French Cavalry Division (DLC), 10 May 1940Nafziger: Organization of a French Mechanised Division (DLM), 10 May 1940
{{DEFAULTSORT:French war planning 1920-1940
Western European theatre of World War II
Military history of France
Military operations of World War II involving Germany
Belgian neutrality in World War II
Battle of Belgium
Military plans