We have seen that the formation in lines is the necessary one for _all_ charges, and that an attack in _one_ line will only be possible in exceptional cases where weakness forbids the formation of several lines, or where the surprised and demoralised condition of the enemy appears to render a second line superfluous. The logical conclusions resulting from these reflections are that all column formations employed in the approach march must keep in view first and foremost the rapid adoption of the attack formation, and that deployment must in principle lead to the formation in lines for attack. The complete deployment in line of any units from the regiment upwards can only be necessary in exceptional cases. It can be formed from the attack formation or direct from column when specially ordered. Taking into consideration the rapidity with which approach, deployment, and attack will often follow each other, I would even advocate that a trumpet-call, "_Form for attack!_" should be laid down in the Regulations. The strength of the various lines will generally have to be ordered according as the objective consists of cavalry or troops using fire action. It will not always be possible to find time for detailed arrangements, particularly during the rapid vicissitudes of a cavalry combat. The trumpet-call would then justify itself, and the lines would be formed by the independent action of squadron leaders, according to the formation the troops were in and the expected breadth of frontage of the enemy. It should be laid down as a guide that of four squadrons one at least should form a second line, and that an unprotected flank should, when possible, be covered by a squadron in échelon. The squadrons nearest the enemy would form a first line, and the remainder would act according to circumstances, and either follow the first line, échelon themselves in rear of it, or, when necessary, prolong it. For the deployment into one line a special call could be used. For the conduct of the fight on foot the same principles hold good as for the infantry. The duties and conditions of the fight are similar, and demand similar general tactical directions. The arrangements for the led horses, however, render the introduction and the conduct of the fight considerably more difficult. There is also a certain difference according as the opponent is infantry or cavalry. For, in the first case, there is generally no danger of a further turning movement, or of threats against the led horses from the flank or rear. In the greater number of cases when arranging for the position and safety of the led horses, only small hostile patrols need be expected. An action may therefore generally be conducted with more boldness under these circumstances than when opposed to cavalry which might seriously threaten the led horses by a mounted reserve. These circumstances must be taken into consideration when dealing with the principles for the conduct of the led horses.