For a long time Italy maintained neutrality, but the onrush of conditions forced her into the war, also on the side of the Allies. The territory of European Italy was 110,623 square miles, and inclusive of her African possessions the territory under the Italian flag was 706,623 square miles.
The territory of the Japanese Empire, also, needs to be taken into consideration, for the reason that Japan, while not entering the European theater of war, declared herself on the side of the Allies by the capture of Kiao-chau, a district leased from China by Germany, and the very next month declared to be a German protectorate. The territorial extent of the Japanese Empire was 254,266 square miles, inclusive of Korea. These are the principal factors to be taken into consideration in the mere question of the territorial extent of the opposing forces.
The geographical position of the belligerent countries, with their corresponding advantages and disadvantages, is the next factor to be considered. The geographical position of the Central Powers is best expressed by the fact that they are central. They have all the advantages of being in a united whole. When, later in the war, Serbia was conquered, Bulgaria joined the Central Powers and Turkey was swung into line, the same condition held true. Germany and her allies were a homogeneous unit, geographically considered. From the point of view of land defense very little of Germany's frontiers bordered upon enemy territory. The small section that confronted France on the west and the larger section facing Russia on the east were her only open points of attack. Her sea front except for the small section near the mouth of the Rhine, was on the Baltic, and secure from naval attack except by the Russian fleet, and Russia has never been a naval power. Her Mediterranean outlet, near Trieste and Fiume, menaced by the Mediterranean fleets of the allied powers, was comparatively safe, for the Austrian fleet was an efficient fighting unit, especially so for defense.
As opposed to this was the openness of England, France, and Russia to naval attack. England has but a small proportion of land to seacoast, and France is open to the sea on three sides. Russia, fronting the Baltic, possessed an infinitely inferior fleet, to which the Allies could send no reenforcement as long as the Skagerrak and Cattegat Straits were the only way into the Baltic; moreover, by the Kiel Canal, connecting the North Sea and the Baltic, the remodeling of which was completed in a few months before the declarations of war, a German naval fleet would possess an enormous advantage over an allied fleet, endeavoring to force entrance into the Baltic. In addition to this, while the Central Powers could work together on both fronts with great ease, thanks to the excellent system of German railways, Great Britain and France had no means of direct communication with their great ally in the east of Europe. Thus, in a measure, the Central Powers were not attacking the Allies at any one time, though it might truly be said that they were being attacked by the Allies. In the event of any lack of synchronization between the plans of Russia and those of the western allies, German and Austrian troops could be massed first on one side of the field of operations and then on the other. Such action was impossible to the Allies. At the time of the great German advance on Paris, Russia could give no aid. At the time of the German advance on Riga, Britain and France could give no aid. Both German advances were checked and the invaders driven back, not by the armies of the Allies, but by two non-interlocking parts of the armies of the Allies. At the same time, the susceptibility to attack on both sides prevented the Central Powers from deflecting all their men to either front, and thus by the mere existence of passive menace, prevented the Central Powers from using their geographic advantage to the full.
Their disadvantage, in the military sense of the recognition of geographical conditions, was that the Central Powers had constantly to bear in mind the necessity of fighting upon two fronts. Russian activity, while important to Britain and France, was a matter with which their policy had nothing to do; the coordination of movements on the west front was a matter entirely outside the scope of the operations of the Russian commanders. The German military staff, on the other hand, had the task of constantly coordinating two separate campaigns, to determine where the greatest number of men should be, to avoid weakening the one side or the other at the wrong moment.
The advantages, again considered geographically, greatly outweigh the disadvantages. The first of these was the homogeneity of the Central Powers. A general could attend a war council in Berlin in the evening, and one in Vienna the next morning. The influence of Germany was an understood thing, moreover, and in Vienna there was a readiness to accept and carry out the policies of the German military staff. There was also a geographical homogeneity, due to modern facility of communication. Not only in mobilization, but in the entire conduct of the war, the geographic nearness of points in Germany and Austria was brought about by an excellent east and west railway system. The disadvantage of fighting on two fronts was partly compensated by the fact that within three days enormous masses of men could be moved from Galicia to the Rhine, or from the Belgian frontier to the wastes of East Prussia. In all Europe there is no stretch of land so well suited by nature for this task of fighting upon two fronts as the area of the combined Austrian and German Empires. This is emphasized by the topography of the Baltic Plain, the Rhine and Danube valleys. One might say, in a measure, that this stretch of territory has not wasted any of its natural mountain defenses by flinging them athwart the territory. Thus the Vosges defend against France, the Alps against Italy, the Transylvanian Alps against Rumania—in the event of that nation entering the war with Russia—the Carpathians behind Galicia against Russia's southern attacks, and the marshy country east of East Prussia against Russian northern attack. Yet it is to be added that these very advantages of defense were also disadvantages of attack. The march through Belgium would not have been necessitated if, for example, the portion of Central Powers territory that confronted France had been of the same character as that which confronted Russia. The mountainous character of that frontier was a determining factor in the invasion of Belgium. The invasion of Belgium was a determining factor in the relation which Germany sustained in the war to the allied powers, and especially to the neutral nations. The relation of the neutral nations, in modern warfare, which requires such immense supplies, is a factor of great importance for success in the field. Therefore, to close the syllogism, the mountainous character of the Vosges country was the primary factor in determining the relation of all other countries to the Central Powers, a factor constantly arising at every point in the Great War. On such geographical factors does the strategy of huge campaigns depend. One more example may be given. In the battles of the Marne it became evident that France's strongest defense was the Argonne Forest, in the battle of the Aisne it became clear that the geological formation of a river bank made the German position almost impregnable.
The topographical position of the allied powers is the next factor to be considered. Germany's geographical resources have been touched upon, and to them may be added the fact that, if invaded, she had, at the Rhine, a marvelous line to fall back upon. The first factor to be considered in France is its openness to attack. Thanks to the Vosges and the Argonne, a line of great strength could be established (it was so established and was so held in the teeth of determined attack) from Belfort to Verdun. But north of Verdun the earth-making forces have not been kind to France, in a military sense. From Verdun to the North Sea is, geographically speaking, open country. This is not the place to discuss the availability of forts in open country, it is sufficient to point out that there is no geographical defense. Between the German border and Paris there is no topographical barrier to an invading army. The Germans found this out in the Franco-Prussian War, and it had not been forgotten.
CHAPTER XXV
ASSEMBLING OF THE GERMAN ARMIES
"The German mobilization was the greatest movement of people that the world has ever seen. Nearly four million people had to be transported from every part of the empire to her borders. The manner in which the population is distributed made the task extremely difficult.