For it was on our centre, made up of Foch's army, which had been constituted on Aug. 20, that the Germans were going to seek revenge for the check of their right wing; if they had succeeded in cutting us off between Sezanne and Mailly, the situation would have been reversed with the advantage on their side. From Sept. 6 to Sept. 9 Foch's army met with repeated assaults, but on the evening of the 9th the left of his army, shifting from west to east toward Fere-Champenoise, flanked the Prussian Guard and the Saxons who were advancing southeast of this town. This bold manoeuvre insured success. The Germans withdrew in great haste, and on the 11th in the morning Gen. Foch entered Chalons-sur-Marne. On his right Langle de Gary's army had also moved forward, and on the 12th, after spirited encounters, it joined, and added to, the line of Gen. Foch's army. Meanwhile Ruffey's army (now Darrail's) had succeeded in stretching its lines north, and, although meeting with a stubborn resistance, hastened the German retreat, which was accelerated by the offensive taken by Castelnau's and Dubail's armies from Nancy to the Vosges. Thanks to this strategic offensive, the campaign turned in our favor. We have maintained this advantage over the enemy ever since. THE RACE FOR THE COAST. _After Sept. 13 the German resistance, strengthened by strong defensive works prepared in advance, checked the French and English pursuit; then began the "race for the sea." During this long battle the German staff never lost the hope of turning the allied left wing, while we hoped to be able to outflank their right wing. The result was a race which at the end of October extended the fronts of the opposing armies as far as the North Sea._ In this race the Germans had an advantage over us, namely, the concentric shape of their front which simplified the problem of carrying troops and supplies. In spite of this advantage, the turning movement attempted by their right with twelve army corps, six reserve corps, and four corps of cavalry, utterly failed. This failure confirmed the victory of the Marne. As early as Sept. 11 Gen. Joffre had directed the effort of Maunoury's army against the German right wing. But this army was not large enough to cope with the situation. So about Sept. 20 a new army was formed on the left of Maunoury's army and intrusted to Gen. de Castelnau. This army strongly intrenched itself in the district which stretches over Lassigny, Roye, and Peronne. It was supported on its left by the territorial divisions of Gen. Brugere. (Sept. 21-26.) But still it was inadequate to achieve our end, and on Sept. 30 further north than the army of Castelnau, Maudhuy's army came to the front, and occupied the region of Arras and Lens, extending toward the north to co-operate with the divisions coming from Dunkirk.