How the devastation of the country is increased through the want of tents for the troops requires no explanation. One would suppose that on account of these two reactionary influences the doing away with tents must have diminished again the energy of war in another way, that troops must remain longer in quarters, and from want of the requisites for encampment must forego many positions which would have been possible had tents been forthcoming. This would indeed have been the case had there not been, in the same epoch of time, an enormous revolution in war generally, which swallowed up in itself all these smaller subordinate influences. The elementary fire of war has become so overpowering, its energy so extraordinary, that these regular periods of rest also have disappeared, and every power presses forward with persistent force towards the great decision, which will be treated of more fully in the ninth book. Under these circumstances, therefore, any question about effects on an army from the discontinuance of the use of tents in the field is quite thrown into the shade. Troops now occupy huts, or bivouac under the canopy of heaven, without regard to season of the year, weather, or locality, just according as the general plan and object of the campaign require. Whether war will in the future continue to maintain, under all circumstances and at all times, this energy, is a question we shall consider hereafter; where this energy is wanting, the want of tents is calculated to exercise some influence on the conduct of war; but that this reaction will ever be strong enough to bring back the use of tents is very doubtful, because now that much wider limits have been opened for the elements of war it will never return within its old narrow bounds, except occasionally for a certain time and under certain circumstances, only to break out again with the all-powerful force of its nature. Permanent arrangements for an army must, therefore, be based only upon that nature. CHAPTER X. Marches Marches are a mere passage from one position to another under two primary conditions. The first is the due care of the troops, so that no forces shall be squandered uselessly when they might be usefully employed; the second, is precision in the movements, so that they may fit exactly. If we marched 100,000 men in one single column, that is, upon one road without intervals of time, the rear of the column would never arrive at the proposed destination on the same day with the head of the column; we must either advance at an unusually slow pace, or the mass would, like a thread of water, disperse itself in drops; and this dispersion, together with the excessive exertion laid upon those in rear owing to the length of the column, would soon throw everything into confusion.