Facing this left center came General Langle's Fourth French Army, covering the southern side of the plain of Chalons, it lay south of Vitry-le-Francois, and faced due north. On this army, it was expected, the brunt of the drive would fall. At this point the French battle line made a sharp angle, the Third French Army, commanded by General Sarrail, occupying a base from Bar-le-Duc to Verdun. It thus faced almost west, skirting the lower edge of the Forest of Argonne. At the same time it was back to back with the Second French Army, which covered the great barrier of forts from Verdun to Toul and Epinal, while the First French Army held the line from Epinal to Belfort. CHAPTER XIII ALLIED AND GERMAN BATTLE PLANS So much for the actual disposition of the armies. The question of preponderance of numbers, of advantages of position, and of comparative fighting efficiency is the next factor with which to be reckoned. The numbers were fairly evenly matched. About twelve days before this fateful day of September 3, 1914, there were approximately 100 German divisions as against seventy-five French, British, and Belgian divisions. But, during those twelve days, French and British mobilization advanced with hectic speed, while, at the same time, Germany was compelled to transfer ten or perhaps fifteen of her divisions to the eastern theater of war. It follows, therefore, that there were about 4,000,000 soldiers in all the armies that confronted each other in the week of September 3-10, 1914, of whom, probably, 3,000,000 were combatants. An early estimate placed the German strength at 1,300,000 combatants, and the Allies at about 1,700,000. A later French estimate put the Germans at 1,600,000, with the Allies between 1,400,000 and 1,500,000. The preponderance of efficiency of equipment lay with the Germans. The plans of the German campaign at this time, so far as they can be determined from the official orders and from the manner in which the respective movements were carried out, were three-fold. The first of these movements was the order given to General von Kluck to swirl his forces to the southeast of Paris, swerving away from the capital in an attempt to cut the communications between it and the Fifth French Army under General d'Esperey. This plan evidently involved a feint attack upon the Sixth French Army under General Manoury (though General Pare took charge of the larger issues of this western campaign), coupled with a swift southerly stroke and an attack upon what was supposed to be the exposed western flank of General d'Esperey's army. The cause of the failure of this attempt was the presence of the British army, as has been shown in the alignment of the armies given above, and as will be shown in detail later, in the recital of the actual progress of the fighting. Important as was this movement, however, it was the least of the three elements in General von Moltke's plan for the shattering of the great defense line of the Allies.