France had to make great efforts to complete her armament in 1915. Germany had already accomplished this in a great measure before the war commenced. It was reserved for German science, if not to render war more bloody (the weapons used in 1914 sufficiently fulfilled this purpose), to violate all the laws of warfare enacted by all the Governments, even by the German Government itself. German science has given birth to gigantic cannon which no law forbids (we shall speak of these further on), but German science will bear, in the judgment of History, the responsibility of having added to the horrors of war an unprecedented ferocity and savagery by the introduction of asphyxiating gases, tear-producing gases, and burning liquids. But we may add that Germany in her turn already suffers greatly herself from her inventions; the Allies having been compelled to adopt and use similar and often much improved weapons. =3. Fighting units.= The fighting units are composed of a variable number of tactical units. The tactical unit is the Division, the composition of which will hereafter be described. It includes infantry, cavalry, artillery, and engineers. It ought to possess also, and we hope it will soon, a special service of aviation. A group of two or three and sometimes four Divisions constitutes an Army Corps. The union of three, four, or five Army Corps forms an Army. In this war, two or three armies placed under one Command form an Army Group. Four or five of these Army Groups exist on the French Front. The general organization of the British differs but little from that of the French armies. Whatever difference there may be exists rather in the organization of the rear than in that of the front. The British occupying a much shorter front, dispose of a proportionately larger number of men. Though the bulk of their forces have been but a short time in France, they have received from their women workers very intelligent and valuable assistance, and, having at their disposal larger appropriations of money, have been able to do much more than France towards perfecting the organization at the rear. The Army Corps and the Division must be organized so as to be entirely and under all circumstances self-sufficient. They may, however, rely upon any reserve forces that the surrounding armies may place at their disposal, according to the work assigned to them. A GLANCE AT THE NORMAL COMPOSITION OF A DIVISION The real fighting unit is the Division. We purposely do not call it a Division of infantry. The Division forms a whole by itself. It is composed of all the different arms in the proportions that have been deemed necessary to the efficiency of the whole body.