It may happen in exceptional cases, under modern conditions, that the larger bodies of cavalry, accompanied by a proportion of other arms, are unable at the moment of collision to employ them—e.g. in close country. There may then be a purely cavalry fight on a large scale, and action must of course be taken according to the tactical principles involved. Early deployment, maintenance of exterior lines, rapid decision, are, as regards the leading, the important factors of success.
It is quite another matter where co-operation of the other arms can be seriously counted on. It is then chiefly the artillery which will set its stamp upon the development of the fight, and it will no longer be possible to act according to purely cavalry tactical principles. A brigade or division, in column of route, or even in several formed columns, if exposed to the enemy's artillery fire, will suffer such material and moral loss that such formations, unless compelled by circumstances, are particularly to be avoided. Whoever is obliged to effect the deployment of his force under the enemy's guns casts from him one of the most important elements of success.
It will therefore be necessary, when advancing against the enemy, to adopt the approach formation, and to seek cover as soon as it is calculated that the hostile artillery are within effective range. In order rightly to calculate this moment the enemy's probable advance must of course be taken into consideration, and, as this may vary greatly according to the pace adopted, it is advisable in this respect not to be too optimistic, but to be deployed rather too early than too late.
Taking into consideration the range of modern artillery, the deployment should commence, therefore, in open country, at latest when some 6,500 yards from the enemy.[28] As this distance will diminish very quickly when the opponents are both rapidly advancing, it will certainly be advisable, if the knowledge of the situation in any way allows, to take up the required breadth of front still earlier.
I would here lay down that a too rapid advance of our own troops, unless rendered necessary by the situation, is in no way advantageous. It is not generally a question of striking the enemy as far to the front as possible, but of striking surely, and of having sufficient strength in hand to annihilate him in the pursuit.
A steady and well-thought-out advance should therefore be undertaken; for a precipitate forward movement distresses the horses quite unnecessarily, renders an appreciation of the situation more difficult, and generally allows of no well-considered action. There is also another reason for avoiding a too rapid advance. This is the fact that in such a case the most important reports generally come in when the force is already in the immediate proximity of the enemy. This disadvantage increases with the rapidity of the advance, as a rapidly moving force will follow more closely on the heels of its reconnoitring patrols. To ride slowly forward and to give the patrols time to send back reports will generally lead to better information as to the situation, and will allow of a better and quicker decision being made. The enormous advantage may then be gained of being deployed earlier than the enemy, and of gaining exterior lines[29] from the beginning.
In spite of this, most cavalry leaders, especially at manœuvres, regard their task as a matter of rapidly covering a certain distance, and see in this the essence of the cavalry spirit. This is, however, by no means so. Coolness, reflection, economy of force in approach and deployment, but that lightning-like decision and action at the proper moment, which can only result from a clear appreciation of the situation, alone make the great cavalry leader. It is just because such opposite qualities must be united in the soul of one man that such leaders are so rare and so difficult to recognise in time of peace.
When a collision with the enemy is in any way in prospect, the commander must in principle remain, during the advance, with the foremost detachments of the advanced guard, in order that reports may reach him as early as possible. When in close proximity to the enemy he will often be obliged to advance with a sufficient escort from point to point, in order that he may be able to study the ground from good points of view, and, where possible, himself observe the movements and dispositions of the enemy. He will thus be in a position to make his preliminary arrangements rapidly and effectively, to spare his troops unnecessary marching, and to counteract any unsuitable dispositions made by his subordinates. He must not, however, conceal from himself that even the most effective measures of reconnaissance may fail, and that he may be faced by the necessity of coming to a decision without full knowledge as to the enemy.
In such cases, when it can be estimated that deploying distance from the enemy has been arrived at, further reconnaissance should not be waited for to assist decision; but the initiative must, under all circumstances, be maintained. The leader, then, must act according to his own judgment, and impose the law upon his opponent, and yet be ready, by careful dispositions, to meet unforeseen events.
It may happen that the opponent is unexpectedly met with, and has gained an advantage in deployment. In such a case a forward deployment generally leads to the dribbling up of the force, hampered, as it will be, by the proximity of the enemy. The deployment should therefore be made either on the existing line of front or to the rear, according to the distance from the enemy, and should be covered, where necessary, by the dismounted action of the advanced guard and by artillery fire. Only thus can the lost freedom of action be regained, as superior breadth of deployment is the first and perhaps the most important step towards the maintenance of the initiative.