German offensive preparations General
Erich von Falkenhayn replaced Colonel-General
Helmuth von Moltke the Younger as Chief of the
German General Staff on 14 September, when the German front in France was being consolidated in Lorraine and on the Aisne. The open western flank beyond the 1st Army and the danger of attacks from the
National redoubt of Belgium, where the
Siege of Antwerp had begun on 20 August, created a dilemma. The German positions in France had to be maintained, when only offensive operations could lead to decisive victory. Appeals for the reinforcement of the
Eastern Front could not be ignored and Falkenhayn cancelled a plan for the 6th Army to break through near
Verdun. The army was sent to the right wing of the German armies, where the flank of 1st army was at
Compiègne, beyond which there were no German forces until Antwerp. Falkenhayn could reinforce the 1st Army with the 6th Army, send it to Antwerp or divide the army by reinforcing the 1st Army and the Antwerp siege with part of the army, while the rest operated in the area between. Falkenhayn chose to move the 6th Army to Maubeuge and outflank the Franco-British left wing, withdrawing the 1st,
7th and
2nd armies to
La Fère,
Laon and
Reims while the 6th Army was redeploying. The
3rd,
4th and
5th armies were to defend if the French attacked first and then attack to the south-west beginning on 18 September. General
Karl von Bülow, the 2nd Army commander and Colonel
Gerhard Tappen of the Operations Branch of the (OHL, Supreme Army Command) objected, because the time needed to move the 6th Army would concede the initiative to the French. Bülow and Tappen recommended an attack by the 1st and 7th armies, with reinforcements from the armies further to the east, for an offensive from Reims to
Fismes and
Soissons, since the French could redeploy troops on undamaged railways. The risk of separating the 1st and 2nd armies again would be avoided; Falkenhayn agreed and ordered the 6th Army to assemble at
St Quentin. Attacks to encircle Verdun from the south and from Soissons to Reims would pin down French troops. On 21 September, Falkenhayn met Bülow and agreed that the 6th Army should concentrate close to Amiens, attack towards the
Channel coast and then envelop the French south of the Somme, in a (decisive battle). The
XXI Corps, which had moved from
Lunéville on 15 September and the
I Bavarian Corps which marched from
Namur, arrived during 24 September but were diverted against the Second Army as soon as they arrived on 24 September, with orders to extend the front northwards from Chaulnes to Péronne, attack the French bridgehead and drive the French back over the Somme.
French preparations French attempts to advance after the German retirement to the Aisne were frustrated after 14 September, when German troops were discovered to have stopped their rwithdrawal and dug in on the north bank of the Aisne. Joffre ordered attacks on the German 1st and 2nd armies but attempts by the Fifth,
Ninth and Sixth armies to advance from had little success. The (French Military Intelligence) reported German troop movements from east to west, which led Joffre to continue moving French troops from the east, which had begun on 2 September with
IV Corps and continued on 9 September with
XX Corps, 11 September with
XIII Corps and
XIV Corps on 18 September. The depletion of the French forces in the east, took place just before the
Battle of Flirey , a German offensive against the
Third Army on either side of Verdun, the Fifth Army north of Reims and the Sixth Army along the Aisne, which ended with the creation of the
St Mihiel Salient. Joffre maintained the French emphasis on the western flank, after receiving intercepted wireless messages, which showed that the Germans were moving an army to the western flank. Joffre continued to send units to the Second Army, north of the Sixth Army. On 24 September, the Second Army was attacked and found difficulty in holding ground, rather than advancing round the German flank as intended. General
Ferdinand Foch ordered the left flank of the French armies to move northward to Arras,
Lens and Lille, to recreate a threat to the German northern flank, by moving through Arras to Cambrai and
Le Cateau and from Lens to Valenciennes and Maubeuge. If the French occupied the area between Cambrai, Valenciennes, Maubeuge and Le Cateau, the German forces on the upper Somme, Oise and the Aisne would lose the use of the two main railways to Liege, although this would not be decisive, since the line from Laon to
Vervins,
Hirson, Charleroi, Namur and Liege and that from Laon to
Mézières and
Montmédy to either Luxemburg and
Treves or
Thionville and
Metz, would still be available to the Germans. French moves to the north were also influenced by events in the siege of Antwerp, where
Termonde fell on 26 September and increased the danger that the city and the Belgian army would be lost. The new Tenth Army was ordered to concentrate around Arras and Lens.
First Battle of Picardy On 18 September, the Sixth Army advance was stopped on a south-east to north-west line at
Carlepont on the south bank of the
Oise and
Noyon on the north bank, which ended the first French outflanking move. Joffre dissolved the Second Army in Lorraine and sent Castelnau and the Second Army headquarters to the north of the Sixth Army, to take over the IV and XIII corps, along with the 1st, 5th, 8th and 10th Cavalry divisions of the French
II Cavalry Corps (General Louis Conneau) from the Sixth Army. The XIV Corps was transferred from the First Army and XX Corps from the original Second Army, to assemble south of Amiens, behind a screen of the 81st, 82nd, 84th and 88th Territorial divisions protecting French communications. The Second Army prepared to advance on 22 September, on a line from
Lassigny northwards to Roye and Chaulnes, around the German flank. Next day, the German II Corps joined the right flank of the 1st Army, for an attack to the south-west with the IV Corps, IX Reserve Corps and the 4th and 7th cavalry divisions. Bülow, ordered Kluck to cancel the offensive and withdraw the two corps behind the right flank of the 1st Army. On 16 September, the 2nd and 9th Cavalry divisions were dispatched from the Aisne front as reinforcements but before the retirement began, the French XIII and IV corps on the left flank of Sixth Army, with the 61st and 62nd divisions of the 6th Group of Reserve Divisions, began to advance along the Oise and met the right flank of the 1st Army between Carlepont and Noyon on 17 September. On the right flank, the French 17th and 45th divisions attacked near Soissons and gained a foothold on the plateau of
Cuffies, just north of the city. The First Battle of Picardy (22–26 September 1914) was the first of the reciprocal
outflanking attempts by the French and German armies after the First Battle of the Aisne (13 September – 28 September) and resulted in an
encounter battle in Picardy. The French Sixth Army attacked up the Oise river valley towards Noyon, as the Second Army assembled further north, ready to advance round the northern flank of the German 1st Army. The Second Army crossed the
Avre on a line from Lassigny northwards to Roye and Chaulnes but met the German II Corps from the 1st Army, that had arrived from the Aisne front, where new entrenchments had enabled fewer men to garrison the front line. The corps moved into line on the night of on the right flank of the IX Reserve Corps. Despite the assistance of four divisions of the
II Cavalry Corps (Lieutenant-General
Georg von der Marwitz), the Germans were pushed back to a line from
Ribécourt to Lassigny and Roye, which menaced German communications through
Ham and St Quentin. On 21 September, the German
XVIII Corps had begun an forced march from Reims and reached Ham on the evening of 23 September. On 24 September, the corps attacked towards Roye and with II Corps, forced back the French IV Corps of the Sixth Army. To the north, the Second Army reached Péronne and formed a bridgehead on the east bank of the Somme, which exhausted the offensive capacity of the Second Army. Joffre sent the XI Corps, the last French reserve, to the Second Army and began to withdraw three more corps for dispatch to the Second Army. On 25 September, a German attack near Noyon pushed back the Second Army. French reinforcements attacked again and from 25 to 27 September, a general action took place along the Western Front from the Vosges to Péronne, after which the main effort of both sides took place further north. ==Battle==