The great military interest of these arrangements must not detain us. Their publication reveals the fact, long unknown save to a few, that Joffre not merely hoped for, but definitely planned, a resumption of the offensive from a line midway between the Sambre and the Marne, that is, from the natural barrier of the Somme and the St. Gobain–Laon hills. We shall see that an effort was made to carry out these dispositions, and that it failed. The failure was lamentable, inasmuch as it doomed another large tract of country to the penalties of invasion. But, because the dispositions ordered on August 25 were only provisional details, not essentials, of the new plan, the military result was in no way compromised. While dealing with local emergencies or opportunities, Joffre envisaged steadily the whole national situation. The essentials of the “General Instruction” of August 25 were four in number: (a) a defensive stand by the armies of Alsace and Lorraine, and a provisional defensive by the two armies next westward, the 3rd and 4th; (b) a strictly controlled continuation of the northern retreat while reorganisation took place and forces were transferred from the east to the north-west; (c) an ultimate offensive initiated by the western and central armies, of which one additional, to be called the 9th, under General Foch, about to be interjected between the 4th and 5th, is not yet mentioned; (d) the constitution of a new left wing, to meet the extraordinary strength of the German right, and to attempt a counter-envelopment. The Amiens–Laon line fell out of the plan; the plan itself remained, and it is fully true to say that in it lies the germ of the battle of the Marne.
III. Battle of the Gap of Charmes
Everything was conditional upon the defence of the eastern frontier, now at its most critical phase.[32]
On the morning of August 24, Lunéville having been occupied on the previous day, the hosts of Prince Ruprecht and General Heeringen were reported to be advancing rapidly toward the entry of the Gap of Charmes by converging roads—the former, on the north, passing before the Nancy hills, southward; the latter, coming westward from around the Donon, by Baccarat. We have seen (p. [31]) that, on the other hand, the 2nd and 1st French armies, in preparation for a decisive action, were ranged in the shape of a right-angle—that of Castelnau (based on Toul) from the foothills north-eastward of Nancy, southward, to Rozelieures and Borville; that of Dubail (based on Epinal) from the northern end of the Vosges, westward, to the same point. How far these positions, with the prospect of being able to close in upon the flanks of the enemy, arose from necessary directions of the retreat, and how far from strategical design, whether of one or both of the army commanders, or of the Commander-in-Chief, does not here concern us; suffice it to say that the two generals won equal honour, and that the Grand Quartier effectively supervised this and subsequent developments of the situation. The opposed forces were now about equal in strength—nine corps on either side.
A space had been left at the point of the angle, north of the Forest of Charmes, west of Rozelieures; and this may have tempted the Germans forward. The 16th Corps of the French 2nd Army, the 8th and 13th of the 1st, with three divisions of cavalry under General Conneau masking them, were ready to fill this space, and, as soon as Lunéville had been lost, proceeded to do so, artillery being massed particularly on Borville plateau. On the afternoon of August 24, the pincers began to close, Dubail holding the imperilled angle and Heeringen’s left, while Castelnau beat upon the enemy’s northern flank. On the morning of the 25th, the Germans took Rozelieures; at 2 p.m. they abandoned it; at 3 p.m., Castelnau issued the order: “En avant, partout, à fond!” Foch’s 20th Corps, aiming at the main line of enemy communications, the Arracourt–Lunéville road, took Réméréville and Erbéviller, east of Nancy, and struck hard, farther south, at Maixe, Crevic, Flainval, and Hudviller, toward Lunéville, which was at the same time threatened on the south-west by the 15th Corps, reaching the Meurthe and Mortagne at Lamath and Blainville. By night, the enemy was conscious of his danger, and escaped constriction by a general withdrawal. On the 26th, further hard fighting confirmed the French victory. Positions were occupied at the foot of the Grand Couronné, on the north, and near St. Dié on the south, which were to save the situation a fortnight later. The Gap of Charmes was definitely closed. The German armies had suffered their first great defeat in the war; and, although little known to the outer world, it did much for the moral of the French ranks. On August 27, General Joffre issued an order praising this “example of tenacity and courage,” and expressing his confidence that the other armies would “have it at heart to follow it.”
Towards the north end of the Franco-German frontier, another check was administered at the same time to the Crown Prince’s Army, near Etain, half-way between Verdun and Metz. General Maunoury, with an ephemeral “Army of Lorraine,” consisting of three reserve divisions, formed part of the 3rd Army of General Ruffey, but was given by the G.Q.G. the special task of watching for any threat on the side of Metz. He could do little, therefore, to help Ruffey in the battle of Virton.[33] On August 24, however, a German postal van was captured with orders showing that the Crown Prince intended to attack in the belief that the French had engaged all their troops. Generals Ruffey, Paul Durand, Grossetti, and Maunoury held a hurried conference; and, the G.Q.G. having given permission, on the following day Maunoury struck out suddenly at the Crown Prince’s left, which was thrown back in disorder.
This victory might have been followed up. But General Joffre did not mistake the real centre of gravity of the situation, and would not change the basis of his new plan. He now considered the eastern front sufficiently secure to justify a transfer of certain units to meet the emergency in the western field. Thither, our attention may return.
IV. Battles of Le Cateau, Guise, and Launois
During the night of August 25—while Smith-Dorrien’s men were defending themselves at Solesmes and Haig’s at Landrecies—General Maunoury received the order to disengage his divisions, and to hurry across country to Montdidier with his Staff, there to complete the formation and undertake the command of the new 6th Army. This distinguished soldier was sixty-seven years of age. Wounded in the war of 1870, he had taken a leading part in the development of the French artillery, directed the Ecole de Guerre, and restored a strict discipline in the garrison of the capital as Governor of Paris. Two of his phrases will help to characterise this gallant officer. The first was that in which, in the moment of victory, he spoke of himself as having for forty-four years directed all his energies toward “la revanche de 1870.” The other was addressed to a group of fellow-officers who were discussing certain German brutalities. He could not understand such things, he said, and added: “When we are in their country, we will give them a terrible lesson in humaneness.”[34]
The Army of the Somme consisted at the outset of the 7th Corps, taken from Alsace (minus its 13th Division, left in Lorraine; plus the 63rd Reserve Division and a Moroccan Brigade from the Châlons camp); the 55th and 56th Divisions of Reserve, taken from the Verdun–Toul region; the 61st and 62nd Divisions of Reserve, detached from the Paris garrison to Arras, under General d’Amade, and brought back from Arras to Amiens. It was constituted in the most unfavourable circumstances; and the idea of a flank attack from the Arras–Amiens region, in support of an offensive from the old line of secondary fortresses La Fère–Laon–Rheims, was no sooner conceived than it had to be abandoned. Maunoury was compelled to send his divisions off piecemeal from railhead to the battlefield. The chief body of them had had such rest as a long journey in goods-vans permits; d’Amade’s reservists had been routed in the north, and had lost heavily. If Kluck had not been absorbed in the effort to destroy Sir John French’s little band of heroes, Maunoury’s task could never have been fulfilled.