Our centre consisted of a new army created on Aug. 29 and of one of those which at the beginning of the campaign had been engaged in Belgian Luxemburg. The first had retreated on Aug. 29 to Sept. 5 from the Aisne to the north of the Marne and occupied the general front Sézanne-Mailly. The second, more to the east, had drawn back to the south of the line Humbauville-Chateau-Beauchamp-Bignicourt-Blesmes-Maurupt-le-Montoy. The enemy, in view of his right being arrested and the defeat of his enveloping movement, made a desperate effort from the 7th to the 10th to pierce our centre to the west and to the east of Fére-Champenoise. On the 8th he succeeded in forcing back the right of our new army, which retired as far as Gouragançon. On the 9th, at 6 o'clock in the morning, there was a further retreat to the south of that village, while on the left the other army corps also had to go back to the line Allemant-Connantre. Despite this retreat the General commanding the army ordered a general offensive for the same day. With the Morocco Division, whose behavior was heroic, he met a furious assault of the Germans on his left toward the marshes of Saint Gond. Then with the division which had just victoriously overcome the attacks of the enemy to the north of Sézanne, and with the whole of his left army corps, he made a flanking attack in the evening of the 9th upon the German forces, and notably the guard, which had thrown back his right army corps. The enemy, taken by surprise by this bold manoeuvre, did not resist, and beat a hasty retreat. On the 11th we crossed the Marne between Tours-sur-Marne and Sarry, driving the Germans in front of us in disorder. On the 12th we were in contact with the enemy to the north of the Camp de Chalons. Our other army of the centre, acting on the right of the one just referred to, had been intrusted with the mission during the 7th, 8th, and 9th of disengaging its neighbor, and it was only on the 10th that, being reinforced by an army corps from the east, it was able to make its action effectively felt. On the 11th the Germans retired. But, perceiving their danger, they fought desperately, with enormous expenditure of projectiles, behind strong intrenchments. On the 12th the result had none the less been attained, and our two centre armies were solidly established on the ground gained. THE OPERATIONS OF THE RIGHT. To the right of these two armies were three others. They had orders to cover themselves to the north and to debouch toward the west on the flank of the enemy, which was operating to the west of the Argonne. But a wide interval in which the Germans were in force separated them from our centre. The attack took place, nevertheless, with very brilliant success for our artillery, which destroyed eleven batteries of the Sixteenth German Army Corps.