Our modern army corps without the heavy artillery of the field army corresponds roughly to this requirement. But should it be lengthened by a heavy howitzer battalion, with the necessary ammunition columns, it will considerably exceed the safe marching depth--if, that is, the necessary advance-guard distance be included. Since, also, the infantry is too weak in proportion to the space required by the artillery to deploy, it becomes advisable in the interests both of powerful attack and of operative efficiency, within the separate troop organizations to strengthen the numbers of the infantry and reduce those of the artillery. In addition to the length of the column, the arrangement of the division is very important for its tactical efficiency. This must be such as to permit the most varied employment of the troops and the formation of reserves without the preliminary necessity of breaking up all the units. This requirement does not at all correspond to our traditional organization, and the man to insist upon it vigorously has not yet appeared, although there can be no doubt as to the inadequacy of the existing tactical organization, and suitable schemes have already been drawn up by competent officers. The army corps is divided into two divisions, the division into two infantry brigades. All the brigades consist of two regiments. The formation of a reserve makes it very difficult for the commander to fix the centre of gravity of the battle according to circumstances and his own judgment. It is always necessary to break up some body when a reserve has to be formed, and in most cases to reduce the officers of some detachment to inactivity. Of course, a certain centre of gravity for the battle may be obtained by assigning to one part of the troops a wider and to the other a narrower space for deployment. But this procedure in no way replaces a reserve, for it is not always possible, even in the first dispositions for the engagement, to judge where the brunt of the battle will be. That depends largely on the measures taken by the enemy and the course of the battle. Napoleon's saying, "_Je m'engage et puis je vois,"_ finds its application, though to a lessened extent, even to-day. The division of cavalry brigades into two regiments is simply a traditional institution which has been thoughtlessly perpetuated. It has not been realized that the duties of the cavalry have completely changed, and that brigades of two regiments are, in addition to other disadvantages, too weak to carry these duties out. This bisecting system, by restricting the freedom of action, contradicts the most generally accepted military principles.