From a military point of view it was true that any pause in the active operations was a disadvantage. It would afford the enemy time to push forward his preparations, and by raising for a time the investment of Paris would give the capital the opportunity to reprovision itself at discretion.
The armistice could, therefore, only be granted in consideration of a corresponding equivalent.
To secure the subsistence of the respective German armies, Strasburg and Toul, which now intercepted the railway communication, must be given over. The siege of Metz was to be maintained; but with regard to Paris, either the blockade was to continue; or, if it were raised, one of the forts commanding the capital was to be occupied by the Germans. The Chamber of Deputies was to be allowed to meet at Tours in full freedom.
These conditions, especially the surrender of the fortified places, were absolutely rejected on the French side, and the negotiations were broken off. Eight days later Toul and Strasburg were in the hands of the Germans.
Reduction of Toul.
(September 23rd.)
As soon as the German coast seemed no longer threatened by the danger of a landing of French troops, the 17th Division, which had been left behind there, was ordered to join the army in France. It arrived before Toul on September 12th.
This place, in itself exempt from capture by storm but commanded by neighbouring heights, had till now been invested by Etappen troops of the IIIrd Army, and shelled by the guns taken at Marsal and with field-guns, but without any particular effect. The infantry on the other hand had established a footing behind the railway embankment and in the suburbs close up to the foot of the glacis, so that sorties by the garrison were rendered almost impossible. In view of these circumstances half the Division was presently sent to Châlons, where sixteen battalions and fifteen squadrons barely sufficed to deal with the extremely hostile attitude of the people, hold the Etappen-lines and safeguard the communication with Germany. Thus only seven battalions, four squadrons, and four field-batteries remained before Toul.
On the 18th there arrived from Nancy by railway ten 15 cm. and sixteen 12 cm. siege guns. The intention was to attack the western face, which was enfiladed from Mont St. Michel, and then to breach the south-west bastion; but first an (unsuccessful) attempt was made to reduce the place by the shorter process of subjecting it to a bombardment with field artillery.