As concerns the nature of these exercises, with special reference to the larger formations, first of all we must secure, by means of a graduated series, the certain co-operation of the constituent elements and of their leaders. Next, it must be insisted on that, for the further actual practical training, as well as for the purely formal drill, a systematic procedure should be the fundamental principle, so that all who participate in them may become clearly aware of the conditions of Warfare, and the means of dealing with them. It is evident that these conditions must form the foundation of the required system. As in War these are constantly changing, there seems a certain degree of contradiction in this demand; but in reality this is not the case, for no matter how the situation may vary, there will always be for its proper criticism some one chief point which will characterize the whole procedure, and thus be decisive for the systematic arrangement of these exercises. The latter can then be divided into two principal groups, according as to whether they are based on the assumption of a Cavalry force acting as an independent unit or in combination with the other Arms. The general conditions in both cases must be clearly brought out, and give them the point of attachment for the further subdivision of the exercises. Thus, with regard to the first case: Reconnaissance from a great distance. Deployment of one or more columns out of defiles or in open country. The land in the vicinity of the training ground can here be advantageously employed. It is not desirable to place the heads of the separate columns at once on the scene of action, using these points as starting-points for the forthcoming exercise. One must give the columns longer marches, and demand that--assisted by a properly-working mechanism for circulating information and orders--they should arrive at the point of action at the proper time, in spite of possible delays or interference on the road. The enemy, whether skeleton or otherwise, must, of course, be handled so that collision occurs within the limits of the training ground. Transition from the relations of advance (or rear) guard and main body to the order these assume on the battle-field. Attacks on a railway or hostile post. Government boundaries form no support for the flanks; these can only be considered as secure when protected by natural obstacles; hence, as a rule, measures must be taken to cover both flanks. Transition from the tactical to the strategical form after completion of an encounter; pursuit of the enemy with one fraction of the force, and continuation of the operation with the remainder; for the latter, only orders need be issued; but it is a matter of considerable importance how this division of force rendered necessary by the tactical encounters is arranged. Retreat after a repulse, in one or several columns. Retirement through defiles. In the second case: