Orders were given to change the base to St. Nazaire, and establish an advance base at Le Mans. This operation was well carried out by the Inspector-General of Communications.
In spite of a severe defeat inflicted upon the Guard 10th and Guard Reserve Corps of the German army by the 1st and 3rd French Corps on the right of the 5th Army, it was not part of General Joffre's plan to pursue this advantage, and a general retirement on to the line of the Marne was ordered, to which the French forces in the more eastern theatre were directed to conform.
A new army (the 9th) has been formed from three corps in the south by General Joffre, and moved into the space between the right of the 5th and left of the 4th Armies.
Whilst closely adhering to his strategic conception to draw the enemy on at all points until a favourable situation was created from which to assume the offensive, General Joffre found it necessary to modify from day to day the methods by which he sought to attain this object, owing to the development of the enemy's plans and changes in the general situation.
In conformity with the movements of the French forces, my retirement continued practically from day to day. Although we were not severely pressed by the enemy, rearguard actions took place continually.
On Sept. 1, when retiring from the thickly-wooded country to the south of Compiègne, the 1st Cavalry Brigade was overtaken by some German cavalry. They momentarily lost a horse artillery battery, and several officers and men were killed and wounded. With the help, however, of some detachments from the 3rd Corps operating on their left, they not only recovered their own guns, but succeeded in capturing twelve of the enemy's.
Similarly, to the eastward, the 1st Corps, retiring south, also got into some very difficult forest country, and a somewhat severe rearguard action ensued at Villers-Cotterets, in which the 4th Guards Brigade suffered considerably.
On Sept. 3 the British forces were in position south of the Marne between Lagny and Signy-Signets. Up to this time I had been requested by General Joffre to defend the passages of the river as long as possible, and to blow up the bridges in my front. After I had made the necessary dispositions, and the destruction of the bridges had been effected, I was asked by the French Commander-in-Chief to continue my retirement to a point some twelve miles in rear of the position I then occupied, with a view to taking up a second position behind the Seine. This retirement was duly carried out. In the meantime the enemy had thrown bridges and crossed the Marne in considerable force, and was threatening the Allies all along the line of the British forces and the 5th and 9th French armies. Consequently several small outpost actions took place.
On Saturday, Sept. 5, I met the French Commander-in-Chief at his request, and he informed me of his intention to take the offensive forthwith, as he considered conditions were very favourable to success.
General Joffre announced to me his intention of wheeling up the left flank of the 6th Army, pivoting on the Marne, and directing it to move on the Ourcq; cross and attack the flank of the 1st German Army, which was then moving in a south-easterly direction east of that river.