No prescribed interval will be kept exactly. It will open, it will close, following the fluctuations of the combat. But the onset, during which it can be kept, is not the moment of brisk combat; it is the moment of the engagement, of contact, consequently, of feeling out. It is essential that there remain space in which to advance. Suppose you are on a plain, for in a maneuver one starts from the flat terrain. In extending the new company it will reenforce the wings of the others, the men naturally supporting the flanks of their comrades. The individual intervals will lessen in order to make room for the new company. The company will always have a well determined central group, a rallying point for the others. If the interval has disappeared there is always time to employ the emergency method of doubling the ranks in front; but one must not forget, whatever the course taken, to preserve good order. We cannot resist closing intervals between battalions; as if we were still in the times of the pikemen when, indeed, it was possible to pass through an interval! To-day, the fighting is done ten times farther away, and the intervals between battalions are not weak joints. They are covered by the fire of the skirmishers, as well covered by fire as the rest of the front, and invisible to the enemy. Skirmishers and masses are the formations for action of poorly instructed French troops. With instruction and unity there would be skirmishers supported and formation in battalion columns at most. Troops in close order can have only a moral effect, for the attack, or for a demonstration. If you want to produce a real effect, use musketry. For this it is necessary to form a single line. Formations have purely moral effect. Whoever counts on their material, effective action against reliable, cool troops, is mistaken and is defeated. Skirmishers alone do damage. Picked shots would do more if properly employed. In attacking a position, start the charge at the latest possible moment, when the leader thinks he can reach the objective not all out of breath. Until then, it has been possible to march in rank, that is under the officers, the rank not being the mathematical line, but the grouping in the hands of the leader, under his eye. With the run comes confusion. Many stop, the fewer as the run is shorter. They lie down on the way and will rejoin only if the attack succeeds, if they join at all. If by running too long the men are obliged to stop in order to breathe and rest, the dash is broken, shattered. At the advance, very few will start. There are ten chances to one of seeing the attack fail, of turning it into a joke, with cries of "Forward with fixed bayonet," but none advancing, except some brave men who will be killed uselessly. The attack vanishes finally before the least demonstration of the foe. An unfortunate shout, a mere nothing, can destroy it.