On August 26 a new army composed of two army corps, five reserve divisions, and a Moorish brigade was constituted. This army was to assemble in the region of Amiens between August 27 and September 1 and take the offensive against the German right, uniting its action with that of the British Army, operating on the line of Ham-Bray-sur-Somme.
The retreat continues.
The hope of resuming the offensive was from this moment rendered vain by the rapidity of the march of the German right wing. This rapidity had two consequences, which we had to parry before thinking of advancing. On the one hand, our new army had not time to complete its detraining, and, on the other hand, the British Army, forced back further by the enemy, uncovered on August 31 our left flank. Our line, thus modified, contained waves which had to be redressed before we could pass to the offensive.
To understand this it is sufficient to consider the situation created by the quick advance of the enemy on the evening of September 2.
A corps of cavalry had crossed the Oise and advanced as far as Château-Thierry. The First Army, (General von Kluck,) comprising four active army corps and a reserve corps, had passed Compiègne.
The Second Army, (General von Bülow,) with three active army corps and two reserve corps, was reaching the Laon region.
The Third Army, (General von Hausen,) with two active army corps and a reserve corps, had crossed the Aisne between the Château Porcien and Attigny.
The German armies.
More to the east the Fourth, Fifth, Sixth and Seventh Armies, namely, twelve army corps, four reserve corps, and numerous Ersatz formations, were in contact with our troops, the Fourth and Fifth Armies between Vouziers and Verdun and the others in the positions which have been indicated above, from Verdun to the Vosges.
The left in peril.
It will, therefore, be seen that our left, if we accepted battle, might be in great peril through the British forces and the new French Army, operating more to the westward, having given way.
A defeat in these conditions would have cut off our armies from Paris and from the British forces and at the same time from the new army which had been constituted to the left of the English. We should thus be running the risk of losing by a single stroke the advantage of the assistance which Russia later on was to furnish.
General Joffre chose resolutely for the solution which disposed of these risks, that is to say, for postponing the offensive and the continuance of the retreat. In this way he remained on ground which he had chosen. He waited only until he could engage in better conditions.
The limit of the retreat.
In consequence, on September 1, he fixed as an extreme limit for the movement of retreat, which was still going on, the line of Bray-sur-Seine, Nogent-sur-Seine, Arcis-sur-Aube, Vitry-le-François, and the region to the north of Bar-le-Duc. This line might be reached if the troops were compelled to go back so far. They would attack before reaching it, as soon as there was a possibility of bringing about an offensive disposition, permitting the co-operation of the whole of our forces.
On September 5 it appeared that this desired situation existed.
The First German Army, carrying audacity to temerity, had continued its endeavor to envelop our left, had crossed the Grand Morin, and reached the region of Chauffry, to the north of Rebaix and of Esternay. It aimed then at cutting our armies off from Paris, in order to begin the investment of the capital.
The German lines.
The Second Army had its head on the line Champaubert, Etoges, Bergeres, and Vertus.
The Third and Fourth Armies reached to Chalons-sur-Marne and Bussy-le-Repos. The Fifth Army was advancing on one side and the other from the Argonne as far as Triacourt-les-Islettes and Juivecourt. The Sixth and Seventh Armies were attacking more to the east.
But—and here is a capital difference between the situation of September 5 and that of September 2—the envelopment of our left was no longer possible.
In the first place, our left army had been able to occupy the line of Sézanne, Villers-St. Georges and Courchamps. Furthermore, the British forces, gathered between the Seine and the Marne, flanked on their left by the newly created army, were closely connected with the rest of our forces.
Allies' armies ready.
This was precisely the disposition which the General in Chief had wished to see achieved. On the 4th he decided to take advantage of it, and ordered all the armies to hold themselves ready. He had taken from his right two new army corps, two divisions of infantry, and two divisions of cavalry, which were distributed between his left and his centre.
On the evening of the 5th he addressed to all the commanders of armies a message ordering them to attack.
Joffre orders the advance.
"The hour has come," he wrote, "to advance at all costs, and to die where you stand rather than give way."
If one examines on the map the respective positions of the German and French armies on September 6 as previously described, it will be seen that by his inflection toward Meaux and Coulommiers General von Kluck was exposing his right to the offensive action of our left. This is the starting point of the victory of the Marne.
The Battle of the Marne.
On the evening of September 5 our left army had reached the front Penchard-Saint-Soutlet-Ver. On the 6th and 7th it continued its attacks vigorously with the Ourcq as objective. On the evening of the 7th it was some kilometers from the Ourcq, on the front Chambry-Marcilly-Lisieux-Acy-en-Multien. On the 8th, the Germans, who had in great haste reinforced their right by bringing their Second and Fourth Army Corps back to the north, obtained some successes by attacks of extreme violence. They occupied Betz, Thury-en-Valois, and Nanteuil-le-Haudouin. But in spite of this pressure our troops held their ground well. In a brilliant action they took three standards, and, being reinforced, prepared a new attack for the 10th. At the moment that this attack was about to begin the enemy was already in retreat toward the north. The attack became a pursuit, and on the 12th we established ourselves on the Aisne.
Enemy left exposed.
Why did the German forces which were confronting us and on the evening before attacking so furiously retreat on the morning of the 10th? Because in bringing back on the 6th several army corps from the south to the north to face our left the enemy had exposed his left to the attacks of the British Army, which had immediately faced around toward the north, and to those of our armies which were prolonging the English lines to the right. This is what the French command had sought to bring about. This is what happened on September 8 and allowed the development and rehabilitation which it was to effect.
The part of the British.
On the 6th the British Army had set out from the line Rozcy-Lagny and had that evening reached the southward bank of the Grand Morin. On the 7th and 8th it continued its march, and on the 9th had debouched to the north of the Marne below Château-Thierry, taking in flank the German forces which on that day were opposing, on the Ourcq, our left army. Then it was that these forces began to retreat, while the British Army, going in pursuit and capturing seven guns and many prisoners, reached the Aisne between Soissons and Longueval.
The rôle of the French army.
The rôle of the French Army, which was operating to the right of the British Army, was threefold. It had to support the British attacking on its left. It had on its right to support our centre, which from September 7 had been subjected to a German attack of great violence. Finally, its mission was to throw back the three active army corps and the reserve corps which faced it.
On the 7th it made a leap forward, and on the following days reached and crossed the Marne, seizing, after desperate fighting, guns, howitzers, mitrailleuses, and 1,300,000 cartridges. On the 12th it established itself on the north edge of the Montagne-de-Reime in contact with our centre, which for its part had just forced the enemy to retreat in haste.
Attack