The Peace of Tilsit made Napoleon the master of Europe with only Great Britain left in the field against him. The subsequent military and political history which led to Napoleon's downfall has no pertinence in the present discussion. What it is essential to recognize is that the German high command in August, 1914, approached a Napoleonic problem in the Napoleonic fashion.
In German quarters there had been before the war, and there has been since, a debate as to the comparative advantage of making the first campaign against France or against Russia. The fact that the attack on France failed has doubtless contributed to strengthen the case of those who held the view of the elder Moltke and advocated an eastern offensive. But this is merely an academic discussion. What is of interest to us now is to recognize that Germany did decide to attack France, that she did direct against the republic the first and necessarily the greatest blow she could deliver. It was not until April, 1915, that she actually undertook an attack upon Russia, and then the prospect of a decisive victory, on the Napoleonic order, had practically disappeared.
THE ATTACK UPON FRANCE
Turning now to the first campaign, the attack upon France, it is to be recognized at the outset that the German purpose was to dispose of France in the military sense for the period of the war by a campaign that should repeat the success of 1870. It was essential that this victory should be achieved before France could profit by Russian activity in the east and before Great Britain could render material military assistance to her French ally. It was equally essential that the blow should be so swift and heavy that it would crush the French before they could equip and organize their great reserves, for whom, thanks to legislative folly and pacifist agitation, there was lacking equipment and arms.
For the accomplishment of this great task, Germany counted upon her superior numbers, the greater speed of her mobilization, and the excess of her population over France to give her a decisive advantage. She counted also upon her advantage in heavy artillery and machine guns, on her organization of motor transport, which was to establish new records in invasion. Only in field artillery, in the now famous "seventy-fives," could France claim any advantage.
In 1870 Sedan had come four weeks after the first German troops had entered France. For the new campaign the Germans allowed six weeks. For this time German high command reckoned that Russia could be mobilized in the east, and that any incidental Russian success in East Prussia or Silesia would be counterbalanced by the tremendous victories to be won in northern France. Paris itself would be a sufficient counterprize for Posen, Breslau, or Cracow.
The time limit, however, imposed certain other conditions. The Franco-German frontier from Luxemburg to Switzerland had been transformed into one long barrier, garnished with detached forts and resting upon the first-class fortresses of Verdun, Toul, Epinal, and Belfort. To pierce such a barrier was not impossible but to break through in three weeks, with the whole French army before the forts and the shortness of the front offering the Germans no opportunity to take advantage of their superior numbers, was recognized as next to impossible.
There was left the roads through Belgium and Luxemburg. To come this way Germany had for more than a decade been constructing strategic railways leading from the Rhine and Moselle valleys to the Belgian frontier, double-track roads that served in a desolate country, but were provided with all the necessary machinery for detraining thousands of soldiers.
Belgium might not consent to suffer this invasion of her territory but the Belgian army was negligible, and the German heavy artillery was known to be adequate to dispose of the antiquated forts of Namur and Liege with brief delay. Once the Germans had passed the Meuse and deployed upon the Belgian plain, they could turn south and pass the Franco-Belgian frontier, which was destitute of real defenses, the few fortresses being obsolete, and thence the road ran down to Paris clear and open.
Conceivably Great Britain might make the Belgian invasion a cause for joining France. But, again, the British army was small, there was the gravest doubt as to whether it would be sent to the Continent at all, and even if it came, it would not redress the balance between the French and German armies. Such being the case, as German high command saw it, Belgium was summoned, and refusing, was attacked, the German armies passing the Belgian frontier in the direction of Liege on August 4, 1914, the day on which Germany declared war upon France, and the forty-fourth anniversary of the invasion of France in the Franco-Prussian War.
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