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 or is to take advantage of the preparation effected by other troops; and, finally,

4. Whether or not it has to fight at night.

A battalion acting alone, whose flanks are not resting on natural obstacles, will, as a rule, place entire companies successively into action so as to retain complete organizations for other purposes. It will seldom be proper for the battalion to form for attack in the regular manner. When this can be done the battalion should form in three lines in conformity with its task of initiating, carrying out, and deciding the fight. In this case the leading company is reinforced by the second company as soon as the situation has become sufficiently clear. More frequently, the battalion commander will send only a single company into action, retaining the others for the time being under cover.

a.     b.

The advance guard battalion of a regiment will, as a rule, be compelled to develop considerable fire in a rencontre (par. 357 German I. D. R.), in order to check the advance of the enemy, and for this purpose it will frequently place two companies into action at once. But since the battalion commander cannot count upon reinforcements and, moreover, as he does not know on which flank the combat is subsequently going to develop, he will provisionally retain the other two companies in rear of the center, or echelon them in rear of both flanks. (See "a" and "b" above figure).

c.     d.