That the very thin as well as the very deep formation is objectionable under ordinary circumstances, and can seldom be employed with safety.
2d.

That the attack by battalions in columns by division is the best for carrying a position; the column should, however, be diminished in depth as much as possible, in order both to increase its own fire and to diminish its exposure to the fire of the enemy; moreover, it should be well covered by tirailleurs and supported by cavalry.
3d.

That the mixed formation of the first line deployed and the second in columns of battalion by division is the best for defence.
4th.

That either of the last two may be employed in the offensive or defensive, according to the nature of the ground, the character of the general, and the character and position of the troops.

Squares are always good against cavalry.
Troops should be habituated to all these formations, and accustomed to pass rapidly from one to another in the daytime or at night.