FROM THE MEUSE TO THE MARNE
To grasp the main circumstances of the opening campaign it is simplest to think of the whole German invading forces as comprising one army. The right of this army under Kluck and Bülow came west through Belgium by Brussels and Namur, swinging south after the Belgians were disposed of, and leaving a guard to curtain the Belgian army which had retreated on Antwerp. The center moved southwest through the Belgian Ardennes and Luxemburg, entering France between Longwy and Givet on the Meuse. The left moved from Metz and Strassburg, attempting to force the French barrier line between Toul and Epinal. The center was commanded by the German Crown Prince, Albert of Württemberg, and Hausen, the left by the Crown Prince of Bavaria and Heeringen. Smaller forces operating in Upper Alsace played little real part in the operations.
Taking up first the German right: It did not begin its real advance until August 12, 1914. Liege had been captured on August 7, the last fort fell on August 15. Meantime the Germans pushed a heavy screen of cavalry forward, and there was steady skirmishing between Liege and Brussels, which was magnified into battles and German defeats. In point of fact, the Belgian army was rapidly pushed back, and once the main German advance began, it fled to Antwerp.
Kluck took Brussels on August 18, 1914, and turned south, meeting the first serious resistance at Mons. Bülow, moving across the Meuse at Huy, took Namur on August 23, 1914, and his troops fought at Charleroi, while those of Hausen forced a passage of the Meuse south of Namur. The French were beaten at Charleroi, and the British while the battle of Mons was still undecided, were forced to retreat, because Bülow's success in taking Namur had imperiled the whole allied left flank.
Because he delayed his retreat too long, Sir John French was immediately threatened with destruction, Kluck having succeeded in getting on his flank, while sending superior numbers against his front. For a week there was grave danger that the Germans would be able to destroy the British and intervene between the French left and the city of Paris. At Cambrai on the 25th, British destruction seemed imminent, but the British just managed to win clear, and French troops coming up on their exposed flank by September 1, they were safe.
The French center had essayed an offensive into the Ardennes at the moment the battle of Charleroi was beginning. In this they did not succeed, and the Fourth Army under Langle de Cary fell back in perfect order from the Belgian-Luxemberg frontier across the Meuse near Sedan, where they held their line until the general retreat began. Henceforth the French armies from left to right were not seriously threatened until the final struggle at the Marne.
But the right under De Castelnau had been obliged to retreat. It had opened the campaign by a series of victories which had carried the main force into German Lorraine as far as Saarburg on the railroad from Metz to Strassburg. To the south Mülhausen had been taken, lost, and recaptured. But in the third week of August the main army encountered strong forces in the region of Morhange and fell back on Nancy, the frontier town of Lunéville being momentarily occupied by the Germans. At Nancy it stood. But its stand was one of the important battles of the western war and a contributory cause to the subsequent victory at the Marne. By this victory the eastern barrier was held and the German effort to isolate Verdun and Toul blocked. Some of the most terrible fighting of the war took place here, and the Germans, fighting under the eye of the kaiser suffered colossal losses.
In the last days of August Joffre had to make his great decision. His right was holding before Nancy, and was soon to make a successful advance, clearing most of eastern Lorraine. His center, stretched across the Champagne country from the Argonne to the Oise, had recovered from early reverses and won several considerable local counteroffenses, notably at Guise. But his left was still shaky, his reserves were not yet up and his reconcentration was incomplete. Should he risk all now, or take his army back until his left rested upon Paris? To do this latter would be to surrender more French territory, but it would mean a further exhaustion of the Germans, a further increase in his numbers. The morale of his troops was unshaken. He had suffered defeats, but merely incidental defeats, the real test had not yet come.
THE BATTLE OF THE MARNE
Joffre decided to continue his retreat, and took his army south of the Marne, his left formed by the British resting upon the forts of Paris, behind which he had massed a new army, his center stretching between Paris and Verdun, his right along the barrier line from Verdun to Switzerland. The German armies, already worn down by their exertions and their losses, were now to be attacked by their foe, whom they regarded as already vanquished.
The first phase of the Battle of the Marne was fought northeast of Paris along the Ourcq, which gives its name to the local battle. Kluck had marched past the French capital, going south along its eastern front and leaving only small guards to cover his rear and flank. He had before him the British and on his flank the new Paris army, of the existence of which he was totally ignorant. In Joffre's strategy this army was to strike east while the British struck north, together they were to act like the two blades of a pair of scissors. Between them Kluck was to be destroyed and his rout would expose the flank and rear of all the German forces in France.
The French struck with great promptness, but the British failed to move quickly enough. Kluck extricated himself from between the blades with supreme generalship, brought his main force back against the French, borrowing a corps from Bülow and presently the French were driven back upon Paris. British slowness had wrecked the master stroke of Joffre's strategy.
But in the center the situation was changing. Joffre had issued his famous order to attack upon September 5. The Paris army under Manoury had struck on the 6th, and the French offensive had steadily communicated itself from west to east along the whole line, that is, to the British army, then to the armies of Franchet d'Espérey, of Foch, of De Langle de Cary, of Sarrail. In the French center about September 9, General Foch, commanding still another new army, had begun his attack. By a combination of operations, which remain the most brilliant of the war, he flung a portion of the Germans before him into the marshes of St. Gond and routed the remainder. In this field the Germans now began a retreat which was almost a rout. Meantime, further to the east, Sarrail, holding Verdun, had begun to attack the crown prince, who was in difficulty.
Foch's success was decisive, Kluck and Bülow began their retreat, leaving their own fights undecided. Hausen, who faced Foch, was removed in disgrace, and his army now in bad shape, went back to Châlons and then to the Rheims-Argonne district. The crown prince with difficulty drew his forces out of the lower Argonne and north of Verdun. The French victory in Lorraine had also become absolute, and the Germans were back on the frontier.
But there was lacking to the French the numbers and the strength to make their victory conclusive. They had been outnumbered at the moment of victory, their twenty-two corps facing twenty-seven at the Marne, 900,000 at most against 1,200,000. The fall of Maubeuge had released fresh German troops, who came south, and, reenforcing Kluck, enabled him to stand at the Aisne. The German front was reconstituted, running from the Oise at Noyon to Metz and the deadlock was about to begin, had in fact begun.
The remainder of the western campaign requires little comment. There now followed that operation, well described as "the race to the sea." The French coming east around the right flank of the Germans north of Noyon attempted to reach their rear at St. Quentin and turn them out of France. The Germans endeavored to extend their line westward to the sea and thus secure their flank and, in addition, take possession of the whole French coast from the mouth of the Somme to Belgium.
Neither side succeeded. Instead a line was erected from the Oise due north to the German Ocean at Nieuport, which became the new battle front. Antwerp fallen, the Germans made a supreme effort to shorten and straighten their line by attacking the French, British, and Belgians, who held the extreme left of the allied forces between Nieuport and La Bassée, along the Yser and about Ypres. This struggle lasted for nearly a month, and was desperate in the extreme. For the British it was a gigantic repetition of Waterloo, and they were again asked to hold a position, not now for hours, but for days, under heavy pressure, and in the face of odds such as Napoleon did not possess in the earlier conflict. In the end the line held, German approach to the Channel was blocked, and by December 1 the western war had dropped to trench fighting which still persists along the lines that had been substantially occupied in November, 1914.