That depth must be maintained in so far as it allows the necessary frontage, is easily understood. In deploying concentrically the various groups do not by any means need to be in touch, as during the advance they will gradually approach each other. They can, or rather must, be disposed at wide intervals, and it is better that these should be too great than that the necessary depth should suffer. A reserve must always be detailed and at the disposal of the commander, in order that he may retain his influence over the decision and be ready to meet the vicissitudes of the conflict. Artillery and machine-guns will generally be able to remain effectively in action longest on the inner flank, and in this position can also form a connecting-link between the cavalry and the flank of the army. Special circumstances, however, may, of course, lead to their employment elsewhere. Their employment on the extreme outer flank, however, so often seen in peace, is to be guarded against. From such a position they can indeed often bring an effective flanking fire to bear, but are, on the other hand, in great danger, especially when opposed to a numerically superior enemy. Should the outcome of the fight be unfavourable, they will generally not only themselves be lost, but may often contribute to the difficulties of the beaten squadrons. Machine-gun detachments must be pushed forward recklessly to within effective range of the enemy, and should not shrink from the danger of occasional capture. Should the hostile cavalry be driven from the field, it must be pursued with sufficient force to prevent its rallying and re-forming, and to complete its material and moral defeat. Should it seek shelter behind occupied points of support, farms, woods, and the like, these must be attacked immediately by employing the greatest possible fire power. It is a matter of absolute necessity to gain possession of such points, as they may otherwise stand in the way of further action. All portions of the cavalry not required for the pursuit should endeavour quickly to regain their tactical cohesion, that they may be ready for further effort. If localities are at hand by the occupation of which the ground won can be secured, they must at once be garrisoned by dismounted men. Artillery and machine-guns will, in so far as they are not detailed for the pursuit, or as they return from it, be brought into position with a like object in view. Every effort must be made to utilise to the full the advantages which the different methods of action of which the arm is capable confer, and thereby to minimise the chances of defeat. _To reckon with the charge alone is, even on the field of battle, out of date, and calculated to limit the effect of cavalry action._