The Battle of La Bassée was fought by German and Franco-British forces in northern France in October 1914, during reciprocal attempts by the contending armies to envelop the northern flank of their opponent, which has been called the Race to the Sea. The 6th Army took Lille before a British force could secure the town and the 4th Army attacked the exposed British flank further north at Ypres. The British were driven back and the German army occupied La Bassée and Neuve Chapelle. Around 15 October, the British recaptured Givenchy-lès-la-Bassée but failed to recover La Bassée.
German reinforcements arrived and regained the initiative, until the arrival of the Lahore Division, part of the Indian Corps. The British repulsed German attacks until early November, after which both sides concentrated their resources on the First Battle of Ypres. The battle at La Bassée was reduced to local operations. In late January and early February 1915, German and British troops conducted raids and local attacks in the Affairs of Cuinchy, which took place at Givenchy-lès-la-Bassée and just south of La Bassée Canal, leaving the front line little changed.
Background
Strategic developments From 17 September to 17 October the belligerents had tried 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 to 9 September and Falkenhayn ordered the German 6th Army to move from the German-French border to the northern flank on 17 September. Next day, French attacks north of the Aisne led to Falkenhayn to order the 6th Army to repulse the French and secure the flank. When the French advanced on 24 September, they met a German attack rather than an open flank and by 29 September, the Second Army had been reinforced to eight corps and extended north but was still opposed by German forces near Lille, rather than an open 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 of protecting the northern flank of the German armies in France, had become the main task.
Tactical developments By 6 October, the French needed British reinforcements to withstand German attacks around Lille. The British Expeditionary Force (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 Second Army on 4 October. The Allies and the Germans attempted to take more ground, after the "open" northern flank had disappeared, Franco-British attacks towards Lille in October, being followed up by attempts to advance between the BEF and the Belgian army by a new French Eighth Army. The moves of the German 7th Army 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 from the National redoubt of Belgium, during the period between the Franco-British retreat and the Battle of the Marne. In August British marines had landed at Dunkirk. In October a new German 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.
Flanders terrain
The North-east of France and the south-west Belgium are known as Flanders. West of a line between Arras and Calais in the north-west, lie chalk downlands covered with soil sufficient for arable farming. To the east of the line, the land declines in a series of spurs into the Flanders plain, bounded by canals linking Douai, Béthune, Saint-Omer and Calais. To the south-east, canals run between Lens, Lille, Roubaix and Courtrai, the Lys river from Courtrai to Ghent and to the north-west lay the sea. The plain is almost flat, apart from a line of low hills from Cassel, east to Mont des Cats, Mont Noir, Mont Rouge, Scherpenberg and Mont Kemmel. From Kemmel, a low ridge lies to the north-east, declining in elevation past Ypres through Wytschaete, Gheluvelt and Passchendaele, curving north then north-west to Diksmuide where it merged with the plain. A coastal strip about wide was near sea level and fringed by sand dunes. Inland the ground was mainly meadow, cut by canals, dykes, drainage ditches and roads built up on causeways. The Lys, Yser and upper Scheldt had been canalised and between them the water level underground was close to the surface, rose further in the autumn and filled any dip, the sides of which then collapsed. The ground surface quickly turned to a consistency of cream cheese and on the coast troops were confined to roads, except during frosts.
The rest of the Flanders Plain was woods and small fields, divided by hedgerows planted with trees and cultivated from small villages and farms. The terrain was difficult for infantry operations because of the lack of observation, impossible for mounted action because of the many obstructions and difficult for artillery because of the limited view. South of La Bassée Canal around Lens and Béthune was a coal-mining district full of slag heaps, pit heads () and miners' houses (). North of the canal, the city of Lille, Tourcoing and Roubaix formed a manufacturing complex, with outlying industries at Armentières, Comines, Halluin and Menin, along the Lys river, with isolated sugar beet and alcohol refineries and a steel works near Aire-sur-la-Lys. Intervening areas were agricultural, with wide roads on shallow foundations and unpaved mud tracks in France and narrow pavé roads, along the frontier and in Belgium. In France, the roads were closed by the local authorities during thaws to preserve the surface and marked by , which were ignored by British lorry drivers. The difficulty of movement after the end of summer absorbed much local labour on road maintenance, leaving field defences to be built by front-line soldiers.
Prelude
Franco-British offensive preparations By 4 October, the troops under Maud'huy were in danger of encirclement, German troops had reached Givenchy, north-west of Vimy and the French division on the northern flank was separated from the cavalry operating further north; a gap had also been forced between X Corps and the Territorial divisions to the south. Castelnau and Maud'huy wished to withdraw but rather than lose all of northern France, Joffre created a new Tenth Army, from Maud'huy's forces and gave Castelnau a directive, to maintain the Second Army in its positions, until the pressure of operations further north, diminished the power of German attacks between the Oise and the Somme. Foch was appointed deputy to Joffre and given command of all French troops in the north. On 6 October, the French line from the Oise to Arras was secured; Joffre and French had also agreed to concentrate the BEF around Doullens, Arras and St Pol, ready for operations on the left of the Tenth Army.
By 8 October, the French XXI Corps had moved its left flank to Vermelles, just short of La Bassée Canal. Further north, the French I and II Cavalry corps (General Louis Conneau) and de Mitry, part of the 87th Territorial Division and some Chasseurs, held a line from Béthune to Estaires, Merville, Aire, Fôret de Clairmarais and St Omer, where the rest of the 87th Territorial Division connected with Dunkirk; Cassel and Lille further east were still occupied by French troops. Next day, the German XIV Corps arrived opposite the French, which released the German 1st and 2nd Cavalry corps to attempt a flanking move between La Bassée and Armentières. The French cavalry were able to stop the German attack north of the La Bassée–Aire canal. The 4th Cavalry Corps further north, managed to advance and on 7 October, passed through Ypres before being forced back to Bailleul, by French Territorial troops near Hazebrouck. From 8 to 9 October, the British II Corps arrived by rail at Abbeville and was ordered to advance on Béthune.
The British 1st and 2nd Cavalry divisions covered the arrival of the infantry and on 10 October, using motor buses supplied by the French, II Corps advanced . By the end of 11 October, II Corps held a line from Béthune to Hinges and Chocques, with flanking units on the right south of Béthune and on the left to the west of the town. On 12 October, the II Corps divisions attacked to reach a line from Givenchy to Pont du Hem, north of La Bassée Canal, across ground which was flat and dotted with farms and buildings as far as a low ridge east of Béthune. The German defenders of I and II Cavalry corps and attached disputed every tactical feature but the British advance continued and a German counter-attack near Givenchy was repulsed. The British dug in from Noyelles to Fosse. On 13 October, the II Corps attack by the 3rd Division and the French 7th Cavalry Division gained little ground and Givenchy was almost lost when the German attacked in a rainstorm, the British losing
German offensive preparations The 6th Army had arrived in northern France and Flanders from the south and progressively relieved German cavalry divisions, VII Corps taking over from La Bassée to Armentières on 14 October, XIX Corps next day around Armentières and XIII Corps from Warneton to Menin. Attacks by the British II and III Corps caused such casualties that XIII Corps was transferred south from 18 to 19 October in reinforcement. The 6th Army line from La Bassée to Armentières and Menin, was ordered not to attack until the operations of the new 4th Army in Belgium had begun. Both armies attacked on 20 October, the XIV, VII, XIII and XIX corps of the 6th Army making a general attack from Arras to Armentières. Next day the northern corps of the 6th Army attacked from La Bassée to St Yves and gained little ground but prevented British and French troops from being moved north to Ypres and the Yser fronts. On 27 October, Falkenhayn ordered the 6th Army to move heavy artillery north for the maximum effort due on 29 October at Gheluvelt, to reduce its attacks on the southern flank against II and III corps and to cease offensive operations against the French further south. was formed from XIII Corps and reinforcements from the armies around Verdun, which further depleted the 6th Army and ended the offensive from La Bassée north to the Lys.
Battle
British-French attacks
14–20 October
On October, II Corps attacked on both sides of La Bassée Canal and German counter-attacks were made each night. The British managed short advances on the flanks, with help from French cavalry but lost From 16 to 18 October, II Corps attacks pivoted on the right and the left flank advanced to Aubers, against German opposition at every ditch and bridge, which inflicted another thousand casualties. Givenchy was recaptured by the British on 16 October, Violaines was taken and a foothold established on Aubers Ridge on 17 October; French cavalry captured Fromelles. On 18 October, German resistance increased as the German XIII Corps arrived, reinforced the VII Corps and gradually forced the II Corps to a halt. On 19 October, British infantry and French cavalry captured Le Pilly (Herlies) but were forced to retire by German artillery-fire.