It is at once evident that for these few manoeuvres few and simple formations and movements will suffice, and that, in view of the excitement of the battle-field, only such are, in fact, applicable.[25] [Footnote 25: As a measure of this excitement the following example may be useful. During the great Cavalry engagement on the plateau west of the Yron brook near Mars-la-Tour a squadron under most brilliant leadership galloped out in column of troops to threaten the enemy's flank. When, however, the order to wheel into line was given, the men were so excited that it was only with the utmost difficulty that its Captain succeeded in getting three troops to obey, whilst the leading one continued on in its original direction. The Squadron Commander was Rittmeister von Rosenberg, who afterwards became Inspector-General of Cavalry, and the above-mentioned incident was related by him personally to the author.] Hence it follows that all complicated movements and changes of lines, and similar formations occurring in the Regulations, may be classed in the category of evolutions intended mainly for disciplinary purposes. On the other hand, we must practise, as thoroughly as practicable, long movements at a rapid pace in the closest formations for manoeuvre--_i.e._, in double and Regimental Columns; changes of direction in these columns by shouldering, passage of defiles, deployments into fighting formations with simultaneous slight alterations in the line of advance; further, measures to secure one's own flanks, or to threaten those of the enemy; deployments to the front immediately out of column of route or after the passage of defiles; the combination of detachments arriving from different directions; and, finally, the charge itself under the most varied assumptions, the transition from the melee to pursuit, and rallying in order to attack again in a new direction against a fresh enemy. Naturally, the most rapid deployments out of any and every formation against a suddenly appearing enemy must also be practised, for such surprises are always possible in War-time. To be avoided, on the other hand, as for the most part quite impracticable, are all movements of a dilatory nature for the formation of fronts of attack, as well as long movements of manoeuvres and considerable changes of front when already deployed into line. In all these exercises, as a general and fundamental principle, such a grouping of the available forces must be striven for that the units can be employed by 'Wings'; for, as I have endeavoured to point out, it is this form of employment which best satisfies the requirements of the combat and meets the needs of the Commander.