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The Battle of the Marne (French: Première bataille de la Marne, also known as the Miracle of the Marne, Le Miracle de la Marne) was a World War I battle fought from 6–10 September 1914. It resulted in an Allied victory against the German armies in the west. The battle was the culmination of the German advance into France and pursuit of the Allied armies which followed the Battle of the Frontiers in August and had reached the eastern outskirts of Paris. A counter-attack by six French armies and the British Expeditionary Force (BEF) along the Marne River forced the Imperial German Army to retreat north-west, leading to the First Battle of the Aisne and the Race to the Sea. The battle was a victory for the Allies but led to four years of trench warfare stalemate on the Western Front.
The Battle of the Frontiers is a general name for all the operations of the French armies from 7 August to 13 September. A series of encounter battles began between the German, French and Belgian armies on the German-French frontier and in southern Belgium on 4 August 1914. Liège was occupied by the Germans on 7 August. The first units of the British Expeditionary Force (BEF) landed in France and French troops crossed the German frontier. The Battle of Mulhouse (Battle of Alsace 7–10 August) was the first French offensive of World War I. The French captured Mulhouse, until forced out by a German counter-attack on 11 August, and fell back toward Belfort. On 12 August, the Battle of Haelen was fought by German and Belgian cavalry and infantry, resulting in a Belgian defensive success. The BEF completed its move of four divisions and a cavalry division to France on 16 August, as the last Belgian fort of the Fortified Position of Liège (Position fortifiée de Liège) surrendered. The Belgian government withdrew from Brussels on 18 August.
The main French offensive, the Battle of Lorraine (14–25 August), began with the Battles of Morhange and Sarrebourg (14–20 August) advances by the First Army on Sarrebourg and the Second Army towards Morhange. Château-Salins near Morhange was captured on 17 August and Sarrebourg the next day. The German 6th and 7th Armies counter-attacked on 20 August, and the Second Army was forced back from Morhange and the First Army was repulsed at Sarrebourg. The German armies crossed the border and advanced on Nancy, but were stopped to the east of the city. The Belgian 4th Division, the solitary part of the Belgian army not to retreat to the defensive lines around Antwerp, dug in to defend Namur, which was besieged on 20 August. Further west, the French Fifth Army had concentrated on the Sambre by 20 August, facing north on either side of Charleroi and east towards Namur and Dinant. Additional support was given to the Belgians at Namur by the French 45th Infantry Brigade. On the left, the Cavalry Corps of General Sordet linked up with the BEF at Mons.
To the south, the French retook Mulhouse on 19 August and then withdrew. By 20 August, a German counter-offensive in Lorraine had begun and the German 4th and 5th Armies advanced through the Ardennes on 19 August towards Neufchâteau. An offensive by the French Third and Fourth Armies through the Ardennes began on 20 August in support of the French invasion of Lorraine. The opposing armies met in thick fog; the French mistook the German troops for screening forces. On 22 August, the Battle of the Ardennes (21–28 August) began with French attacks, which were costly to both sides and forced the French into a disorderly retreat late on 23 August. The Third Army recoiled towards Verdun, pursued by the 5th Army, and the Fourth Army retreated to Sedan and Stenay. Mulhouse was recaptured again by German forces and the Battle of the Meuse (26–28 August), caused a temporary halt of the German advance.
The Great Retreat took place from 24 August to 5 September; the French Fifth Army fell back about 15 kilometres (10 mi) from the Sambre during the Battle of Charleroi (22 August) and began a greater withdrawal from the area south of the Sambre on 23 August. That evening, the 12,000 Belgian troops at Namur withdrew into French-held territory and at Dinant, 674 men, women and children were summarily executed by Saxon troops of the German 3rd Army; the first of several civilian massacres committed by the Germans in 1914.
At the Battle of Mons (23 August), the BEF attempted to hold the line of the Mons–Condé Canal against the advancing German 1st Army. The British were eventually forced to withdraw due to being outnumbered by the Germans and the sudden retreat of the French Fifth Army, which exposed the British right flank. Though planned as a simple tactical withdrawal and executed in good order, the British retreat from Mons lasted for two weeks, and covered 400 kilometres (250 mi). During the retreat, BEF commander Sir John French began to make contingency plans for a full retreat to the ports on the English Channel followed by an immediate British evacuation. On 1 September Lord Kitchener, the British Secretary of State for War, met with French (and French Prime Minister Viviani and War Minister Millerand), and ordered him not to withdraw to the Channel. The BEF retreated to the outskirts of Paris, before it counter-attacked in concert with the French, in the Battle of the Marne.
The French First and Second Armies had been pushed back, by attacks of the German 7th and 6th Armies between St. Dié and Nancy. The Third Army held positions east of Verdun against attacks by the German 5th Army; the Fourth Army held positions from the junction with the Third Army south of Montmédy, westwards to Sedan, Mezières, and Fumay, facing the German 4th Army; the Fifth Army was between Fumay and Maubeuge; the Third Army was advancing up the Meuse valley from Dinant and Givet, into a gap between the Fourth and Fifth Armies and the Second Army pressed forward into the angle between the Meuse and Sambre, directly against the Fifth Army. On the far west flank of the French, the BEF prolonged the line from Maubeuge to Valenciennes against the German 1st Army and Army Detachment von Beseler masked the Belgian army at Antwerp.
On 26 August, German forces captured Valenciennes and began the Siege of Maubeuge (24 August – 7 September). Leuven, (Louvain) was sacked by German troops and the Battle of Le Cateau was fought by the BEF and the First Army. Longwy was surrendered by its garrison and next day, British marines and a party of the Royal Naval Air Service (RNAS) landed at Ostend; German troops occupied Lille and Mezières. Arras was occupied on 27 August and a French counter-offensive began at the Battle of St. Quentin (Battle of Guise 29–30 August). On 29 August, the Fifth Army counter-attacked the German 2nd Army south of the Oise, from Vervins to Mont-d'Origny and west of the river from Mont-d'Origny to Moy towards St. Quentin on the Somme, while the British held the line of the Oise west of La Fère. German troops captured Laon, La Fère, and Roye on 30 August and Amiens the next day. On 1 September, the Germans entered Craonne and Soissons. On 5 September German troops reached Claye-Souilly, 15 kilometres (10 mi) from Paris, captured Reims, and withdrew from Lille, and the BEF ended its retreat from Mons. Also on that day French troops counterattacked in the Battle of the Ourcq 5–12 September, marking the end of the Great Retreat of the western flank of the Franco-British armies.
In the east, the Second Army had withdrawn its left flank, to face north between Nancy and Toul; the First and Second Armies had slowed the advance of the German 7th and 6th Armies west of St. Dié and east of Nancy by 4 September. There was a gap between the left of the Second Army and the right of the Third Army at Verdun, which faced north-west, on a line towards Revigny, against the Fifth Army advance west of the Meuse between Varennes and Sainte-Menehould. The Fourth Army had withdrawn to Sermaize, westwards to the Marne at Vitry-le-François and crossed the river to Sompons, against the German 4th Army, which had advanced from Rethel to Suippes and the west of Châlons. The new French Ninth Army held a line from Mailly against the German 3rd Army, which had advanced from Mézières, over the Vesle and the Marne west of Chalons. The Second Army had advanced from Marle on the Serre, across the Aisne and the Vesle, between Reims and Fismes to Montmort, north of the junction of the French 9th and 5th Armies at Sézanne.
The Fifth Army and the BEF had withdrawn south of the Oise, Serre, Aisne, and Ourq, pursued by the German 2nd Army on a line from Guise to Laon, Vailly, and Dormans and by the 1st Army from Montdidier, towards Compiègne and then south-east towards Montmirail.
French garrisons were besieged at Metz, Thionville, Longwy, Montmédy, and Maubeuge. The Belgian army was invested at Antwerp in the National Redoubt and Belgian fortress troops continued the defence of the Liège forts. The Military governor of Paris, General Joseph Gallieni, was tasked with the defence of the city.
Late on 4 September, Joffre ordered the Sixth Army to attack eastwards over the Ourcq towards Château Thierry as the BEF advanced towards Montmirail, and the Fifth Army attacked northwards with its right flank protected by the Ninth Army along the St. Gond marshes. On 5 September, the Battle of the Ourcq commenced when the Sixth Army advanced eastwards from Paris. That morning it came into contact with cavalry patrols of the IV Reserve Corps of General Hans von Gronau, on the right flank of the 1st Army west of the Ourcq River. Seizing the initiative in the early afternoon, the two divisions of IV Reserve Corps attacked with field artillery and infantry into the gathering Sixth Army and pushed it back. Overnight, the IV Reserve Corps withdrew to a better position 10 kilometres (6.2 mi) east, while Von Kluck, alerted to the approach of the Allied forces, began to wheel his army to face west.
Gronau ordered the II Corps to move back to the north bank of the Marne, which began a redeployment of all four 1st Army corps to the north bank which continued until 8 September. The swift move to the north bank prevented the Sixth Army from crossing the Ourcq. In this move against the French threat from the west, von Kluck ignored the Franco-British forces advancing from the south against his left flank and opened a 50-kilometre (30 mi) gap in the German lines between the 1st Army and the 2nd Army on its left (east). Allied air reconnaissance observed German forces moving north to face the Sixth Army and discovered the gap.
The Allies were prompt in exploiting the break in the German lines, sending the BEF and the Fifth Army into the gap between the two German armies. The right wing of the Fifth Army attacked on 6 September and pinned the 2nd Army in the Battle of the Two Morins, named for the two rivers in the area, the Grand Morin and Petit Morin. The BEF advanced on 6–8 September, crossed the Petit Morin, captured bridges over the Marne, and established a bridgehead 8 kilometres (5 mi) deep. The Fifth Army by 8 September crossed the Petit Morin, which forced Bülow to withdraw the right flank of the 2nd Army. Next day the Fifth Army recrossed the Marne, and the German 1st and 2nd Armies began to retire. The Germans had still hoped to smash the Sixth Army between 6 and 8 September, but the Sixth Army was reinforced on the night of 7/8 September by 10,000 French reserve infantry ferried from Paris. This included about 3,000 men from the Seventh Division who were transported in a fleet of Paris taxicabs requisitioned by General Gallieni.
On September 7, 1914, General Gallieni gathered about six hundred taxicabs at Les Invalides in central Paris to carry soldiers to the front at Nanteuil-le-Haudouin, fifty kilometers away. Each taxi carried five soldiers, four in the back and one next to the driver. Only the back lights of the taxis were lit; the drivers were instructed to follow the lights of the taxi ahead. Most of the taxis were demobilized on September 8 but some remained longer to carry the wounded and refugees. The taxis, following city regulations, dutifully ran their meters. The French treasury reimbursed the total fare of 70,012 francs.
The arrival of six thousand soldiers by taxi has traditionally been described as critical in stopping a possible German breakthrough against the 6th Army. However, in 2001, Strachan described the course of the battle without mentioning taxis and in 2009, Herwig called the matter a legend: he wrote that many French soldiers travelled in lorries and all the artillery left Paris by train. The impact on morale was undeniable, the taxis de la Marne were perceived as a manifestation of the union sacrée of the French civilian population and its soldiers at the front, reminiscent of the people in arms who had saved the French Republic Campaign of 1794: a symbol of unity and national solidarity beyond their strategical role in the battle. It was also the first large-scale use of motorized infantry in battle; a Marne taxicab is prominently displayed in the exhibit on the battle at the Musée de l'Armée at Les Invalides in Paris.
The reinforced Sixth Army held its ground. The following night, on 8 September, the Fifth Army launched a surprise attack against the 2nd Army, further widening the gap between the 1st and 2nd Armies. Moltke, at OHL in Luxembourg, was effectively out of communication with the German army HQs. He sent his intelligence officer, Oberstleutnant Richard Hentsch to visit the HQs. On 8 September, Hentsch met with Bülow, and they agreed that the 2nd Army was in danger of encirclement and would retreat immediately. On 9 September, Hentsch reached the 1st Army's HQ, met with von Kluck's chief of staff, and issued orders for the 1st Army to retreat to the Aisne River.
Moltke suffered a nervous breakdown upon hearing of the danger. His subordinates took over and ordered a general retreat to the Aisne, to regroup for another offensive. The Germans were pursued by the French and British, although the pace of the exhausted Allied forces was slow and averaged only 19 km (12 mi) per day. The Germans ceased their retreat after 65 km (40 mi), at a point north of the Aisne River, where they dug in, preparing trenches. By 10 September the German armies west of Verdun were retreating towards the Aisne. Joffre ordered Allied troops to pursue, leading to the First Battle of the Aisne (see below).
The German retreat from 9–13 September marked the end of the Schlieffen Plan. Moltke is said to have reported to the Kaiser: "Your Majesty, we have lost the war." (Majestät, wir haben den Krieg verloren).
Whether General von Moltke actually said to the Emperor, "Majesty, we have lost the war," we do not know. We know anyhow that with a prescience greater in political than in military affairs, he wrote to his wife on the night of the 9th, "Things have not gone well. The fighting east of Paris has not gone in our favour, and we shall have to pay for the damage we have done".
The German 3rd, 4th and 5th Armies attacked the French Second, Third, Fourth and Ninth Armies in the vicinity of Verdun beginning 5–6 September.
German attacks against the Second Army south of Verdun from 5 September almost forced the French to retreat. South-east of Verdun, the Third Army was forced back to the west of Verdun by German attacks on the Meuse Heights, but maintained contact with Verdun and the Fourth Army to the west.
Other fighting included the capture of the village of Revigny in the Battle of Revigny (Bataille de Revigny), the Battle of Vitry (Bataille de Vitry) around Vitry-le-François, and the Battle of the Marshes of Saint-Gond around Sézanne. On 7 September German advances created a salient south of Verdun at St. Mihiel, which threatened to separate the Second and Third Armies. General Castelnau prepared to abandon the French position around Nancy, but his staff contacted Joffre, who ordered Castelnau to hold for another 24 hours.
German attacks continued through 8 September but soon began to taper off as Moltke began shifting troops to the west. By 10 September the Germans had received orders to stop attacking and withdrawal towards the frontier became general.
At the start of the war both sides had plans that they counted on to deliver a short war. However, both sides were ultimately disappointed. The Battle of the Marne was the second great battle on the Western Front, after the Battle of the Frontiers, and one of the most important events of the war. While the German Schlieffen Plan failed to decisively defeat the Allies in France, the German army occupied a good portion of northern France as well as most of Belgium and it was the failure of the French Plan 17 that caused that situation. It is generally agreed among historians that the battle was an Allied victory that saved Paris and kept France in the war, but there is considerable disagreement as to the extent of the victory.
After the battle of the Marne the German Armies retreated for up to 90 kilometres (56 mi) and lost 11,717 prisoners, 30 guns and 100 machine-guns to the French and 3,500 prisoners to the British before reaching the Aisne. The German retreat ended their hope of pushing the French beyond the Verdun–Marne–Paris line and winning a quick victory. Following the battle and the failures by both sides to turn the opponent's northern flank during the Race to the Sea, the war of movement ended with the Germans and the Allies facing each other across a stationary front line. Both sides were faced with the prospect of costly siege warfare operations if they chose to continue an offensive strategy in France.
Historians' interpretations characterize the Allied advance as a success. While Terraine contemporized that "nowhere, and at no time, did it present the traditional aspect of victory", he stated that the French and British stroke into the breach between the 1st and 2nd German Armies "made the battle of the Marne the decisive battle of the war". Tuchman and Doughty wrote that Joffre's victory at the Marne was far from decisive, Tuchman calling it an "... incomplete victory of the Marne ..." and Doughty [the] "... opportunity for a decisive victory had slipped from his hands." Sumner called it a flawed victory and that it proved impossible to deal the German armies "a decisive blow". Tuchman wrote that Kluck explained the German failure at the Marne as: "... the reason that transcends all others was the extraordinary and peculiar aptitude of the French soldier to recover quickly. [...] That men will let themselves be killed where they stand, that is well-known and counted on in every plan of battle. But that men who have retreated for ten days, sleeping on the ground and half dead with fatigue, should be able to take up their rifles and attack when the bugle sounds, is a thing upon which we never counted. It was a possibility not studied in our war academy."
The significance of the battle centres on its undermining of the Schlieffen Plan, which forced Germany to fight a two-front war against France and Russia—the exact scenario that its strategists had long feared. Historian Richard Brooks claimed that, "By frustrating the Schlieffen Plan, Joffre had won the decisive battle of the war, and perhaps of the century."
The Battle of the Marne was also one of the first battles in which reconnaissance aircraft played a decisive role, by discovering weak points in the German lines, which the Allies were able to exploit.
Over two million men fought in the First Battle of the Marne and although there are no exact official casualty counts for the battle, estimates for the actions of September along the Marne front for all armies are often given as c. 500,000 killed or wounded. French casualties totalled 250,000 men, of whom 80,000 were killed. Some notable people died in the battle, such as Charles Péguy, who was killed while leading his platoon during an attack at the beginning of the battle. Tuchman gave French casualties for August as 206,515 from Armées Françaises and Herwig gave French casualties for September as 213,445, also from Armées Françaises for a total of just under 420,000 in the first two months of the war. According to Roger Chickering, German casualties for the 1914 campaigns on the Western Front were 500,000. British casualties were 13,000 men, with 1,700 killed. The Germans suffered c. 250,000 casualties. No future battle on the Western Front would average so many casualties per day.
In 2009, Herwig re-estimated the casualties for the battle. He wrote that the French Official History, Les armées françaises dans la grande guerre, gave 213,445 French casualties in September and assumed that c. 40% occurred during the Battle of the Marne. Using the German Sanitätsberichte, Herwig recorded that from 1–10 September, the 1st Army had 13,254 casualties, the 2nd Army had 10,607 casualties, the 3rd Army had 14,987 casualties, the 4th Army had 9,433 casualties, the 5th Army had 19,434 casualties, the 6th Army had 21,200 casualties and the 7th Army had 10,164 casualties. Herwig estimated that the five German Armies from Verdun to Paris had 67,700 casualties during the battle and assumed 85,000 casualties for the French. Herwig wrote that there were 1,701 British casualties (the British Official History noted that these losses were incurred from 6–10 September). Herwig estimated 300,000 casualties for all sides at the Marne but questioned whether isolating the battle was justified.
In 2010, Ian Sumner wrote that there were 12,733 British casualties, including 1,700 dead. Sumner cites the same overall casualty figure for the French for September as Herwig from Armées Françaises, which includes the losses at the battle of the Aisne, as 213,445 but provides a further breakdown: 18,073 killed, 111,963 wounded and 83,409 missing.
On 10 September, Joffre ordered the French armies and the BEF to advance and for four days, the Armies on the left flank moved forward and gathered up German stragglers, wounded and equipment, opposed only by rearguards. On 11 and 12 September, Joffre ordered outflanking manoeuvres by the armies on the left flank but the advance was too slow to catch the Germans, who ended their withdrawal on 14 September, on high ground on the north bank of the Aisne and began to dig in. Frontal attacks by the Ninth, Fifth, and Sixth Armies were repulsed from 15–16 September. This led Joffre to transfer the Second Army west to the left flank of the Sixth Army, the first phase of Allied attempts to outflank the German armies in "The Race to the Sea".
French troops had begun to move westwards on 2 September, using the undamaged railways behind the French front, which were able to move a corps to the left flank in 5–6 days. On 17 September, the French Sixth Army attacked from Soissons to Noyon, at the westernmost point of the French flank, with the XIII and IV corps, which were supported by the 61st and 62nd divisions of the 6th Group of Reserve Divisions. After this the fighting moved north to Lassigny and the French dug in around Nampcel.
The French Second Army completed a move from Lorraine and took over command of the left-hand corps of the Sixth Army, as indications appeared that German troops were also being moved from the eastern flank. The German IX Reserve Corps arrived from Belgium by 15 September and next day joined the 1st Army for an attack to the south-west, with the IV Corps and the 4th and 7th cavalry divisions, against the attempted French envelopment. The attack was cancelled and the IX Reserve Corps was ordered to withdraw behind the right flank of the 1st Army. The 2nd and 9th Cavalry divisions were dispatched as reinforcements next day but before the retirement began, the French attack reached Carlepont and Noyon, before being contained on 18 September. The German armies attacked from Verdun westwards to Reims and the Aisne at the Battle of Flirey (19 September – 11 October), cut the main railway from Verdun to Paris and created the St. Mihiel salient, south of the Verdun fortress zone. The main German effort remained on the western flank, which was revealed to the French by intercepted wireless messages. By 28 September, the Aisne front had stabilised and the BEF began to withdraw on the night of 1/2 October, with the first troops arriving in the Abbeville on the Somme on the night of 8/9 October. The BEF prepared to commence operations in French Flanders and Flanders in Belgium, joining with the British forces that had been in Belgium since August.
From 17 September – 17 October the belligerents made reciprocal attempts to turn the northern flank of their opponent. Joffre ordered the French Second Army to move to the north of the French Sixth Army, by moving from eastern France from 2–9 September and Falkenhayn who had replaced Moltke on 14 September, ordered the German 6th Army to move from the German-French border to the northern flank on 17 September. By the next day, French attacks north of the Aisne led Falkenhayn to order the 6th Army to repulse the French and secure the flank. The French advance at the First Battle of Picardy (22–26 September) met a German attack rather than an open flank and by the end of the Battle of Albert (25–29 September), the Second Army had been reinforced to eight Corps but was still opposed by German forces at the Battle of Arras (1–4 October), rather than advancing around the German northern flank. The German 6th Army had also found that on arrival in the north, it was forced to oppose the French attack rather than advance around the flank and that the secondary objective, to protect the northern flank of the German Armies in France, had become the main task. By 6 October, the French needed British reinforcements to withstand German attacks around Lille. The BEF had begun to move from the Aisne to Flanders on 5 October and reinforcements from England assembled on the left flank of the Tenth Army, which had been formed from the left flank units of the 2nd Army on 4 October.
The Allies and the Germans attempted to take more ground after the "open" northern flank had disappeared. The Franco-British attacks towards Lille in October at the battles of La Bassée, Messines and Armentières (October–November) were followed up by attempts to advance between the BEF and the Belgian army by a new French Eighth Army. The moves of the 7th and then the 6th Army from Alsace and Lorraine had been intended to secure German lines of communication through Belgium, where the Belgian army had sortied several times, during the period between the Great Retreat and the Battle of the Marne; in August, British marines had landed at Dunkirk. In October, a new 4th Army was assembled from the III Reserve Corps, the siege artillery used against Antwerp, and four of the new reserve corps training in Germany. A German offensive began by 21 October but the 4th and 6th Armies were only able to take small amounts of ground, at great cost to both sides at the Battle of the Yser (16–31 October) and further south in the First Battle of Ypres (19 October–22 November). Falkenhayn then attempted to achieve a limited goal of capturing Ypres and Mont Kemmel.
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