Meanwhile, the Duke of Wurtemberg and the Crown Prince attacked fiercely at the junction of the Fourth and Third French Armies under Langle de Cary and Sarrail respectively. The aim of the attack was to separate these two armies and force what is known as the _Revigny Pass_. The latter is a hollow through which flow the Rivers Ornain and Saulx, and the canal from the Marne to the Rhine. While the Germans under the Duke of Wurtemberg attacked the right of Langle de Cary's army, in the direction of Saint-Dizier, the Crown Prince sought to drive back General Sarrail's left towards Bar-le-Duc. The resistance of Langle de Cary's army began to weaken under the weight of the greater opposing forces. On the other hand, General Sarrail's army reinforced by an army corps sent by Joffre stood firm. At this juncture General Sarrail learned that the Germans were getting very active in his rear, on the heights above the River Meuse, and was accordingly obliged to make dispositions to avoid being surprised by German forces who were preparing to cross the river. SEPTEMBER 8, 1914 During the night of September 7-8 Gallieni, who had been following carefully the different phases of the battle, despatched a division from Paris, in all haste, to Maunoury's left to assist in turning the German right. To do this with maximum rapidity, Gallieni made use of an ingenious expedient, "a civilian's idea," as he termed it. He commandeered all the taxicabs in Paris. Those running in the streets were held up by the police, and the occupants made to alight. When the latter learned the reason, instead of grumbling, they gave a rousing cheer. Eleven hundred taxis made the journey twice during the night from Paris to the front transporting, in all, eleven thousand men. Unfortunately, the effect of these reinforcements was fully counterbalanced by the troops which Von Kluck had brought up on the two previous days from before the British front, and only the extreme tenacity and courage of his troops enabled Maunoury to avoid being outflanked. However, Von Kluck could not with impunity reduce his forces opposed to the British. The latter pulled themselves together, crossed the Petit Morin river and reached La Ferté-sous-Jouarre. The danger feared by the German generals became apparent. [Illustration: FOCH] [Illustration: VON HAUSEN] On this day of September 8, a German officer wrote in his notebook: "_Caught sight of Von Kluck. His eyes usually so bright, were dull. He, who was wont to be so alert, spoke in dejected tones. He was absolutely depressed._" At the right of the British army, General Franchet d'Esperey continued his rapid advance and occupied the outskirts of Montmirail. Moreover, his troops co-operated efficiently in helping to check the violent attacks of Von Bulow's army against Grossetti's division.