On War

by Carl von Clausewitz

Now the more these qualifications and influences are wanting in an army, the greater they are on the side of its opponent, so much the more will it dread being split into fractions, the more it will avoid a broken country; but to avoid fighting in such a description of country is seldom a matter of choice; we cannot choose a theatre of war like a piece of merchandise from amongst several patterns, and thus we find generally that armies which from their nature fight with advantage in concentrated masses, exhaust all their ingenuity in trying to carry out their system as far as possible in direct opposition to the nature of the country. They must in consequence submit to other disadvantages, such as scanty and difficult subsistence for the troops, bad quarters, and in the combat numerous attacks from all sides; but the disadvantage of giving up their own special advantage would be greater.

These two tendencies in opposite directions, the one to concentration the other to dispersion of forces, prevail more or less according as the nature of the troops engaged incline them more to one side or the other, but however decided the tendency, the one side cannot always remain with his forces concentrated, neither can the other expect success by following his system of warfare in scattered bodies on all occasions. The French were obliged to resort to partitioning their forces in Spain, and the Spaniards, whilst defending their country by means of an insurgent population, were obliged to try the fate of great battles in the open field with part of their forces.

Next to the connection which country and ground have with the general, and especially with the political, composition of the forces engaged, the most important point is the relative proportion of the three arms.

In all countries which are difficult to traverse, whether the obstacles are mountains, forests, or a peculiar cultivation, a numerous cavalry is useless: that is plain in itself; it is just the same with artillery in wooded countries; there will probably be a want of room to use it with effect, of roads to transport it, and of forage for the horses. For this arm highly cultivated countries are less disadvantageous, and least of all a mountainous country. Both, no doubt, afford cover against its fire, and in that respect they are unfavourable to an arm which depends entirely on its fire: both also often furnish means for the enemy’s infantry to place the heavy artillery in jeopardy, as infantry can pass anywhere; but still in neither is there in general any want of space for the use of a numerous artillery, and in mountainous countries it has this great advantage, that its effects are prolonged and increased in consequence of the movements of the enemy being slower.

But it is undeniable that infantry has a decided advantage over every other arm in difficult country, and that, therefore, in such a country its number may considerably exceed the usual proportion.

CHAPTER XVIII.
Command of Ground

The word “command” has a charm in the art of war peculiar to itself, and in fact to this element belongs a great part, perhaps half the influence which ground exercises on the use of troops. Here many of the sacred relics of military erudition have their root, as, for instance, commanding positions, key positions, strategic manœuvres, etc. We shall take as clear a view of the subject as we can without prolixity, and pass in review the true and the false, reality and exaggeration.

Every exertion of physical force if made upwards is more difficult than if it is made in the contrary direction (downwards); consequently it must be so in fighting; and there are three evident reasons why it is so. First, every height may be regarded as an obstacle to approach; secondly, although the range is not perceptibly greater in shooting down from a height, yet, all geometrical relations being taken into consideration, we have a better chance of hitting than in the opposite case; thirdly, an elevation gives a better command of view. How all these advantages unite themselves together in battle we are not concerned with here; we collect the sum total of the advantages which tactics derives from elevation of position and combine them in one whole which we regard as the first strategic advantage.

But the first and last of these advantages that have been enumerated must appear once more as advantages of strategy itself, for we march and reconnoitre in strategy as well as in tactics; if, therefore, an elevated position is an obstacle to the approach of those on lower ground, that is the second; and the better command of view which this elevated position affords is the third advantage which strategy may derive in this way.

Of these elements is composed the power of dominating, overlooking, commanding; from these sources springs the sense of superiority and security which is felt in standing on the brow of a hill and looking at the enemy below, and the feeling of weakness and apprehension which pervades the minds of those below. Perhaps the total impression made is at the same time stronger than it ought to be, because the advantage of the higher ground strikes the senses more than the circumstances which modify that advantage. Perhaps the impression made surpasses that which the truth warrants, in which case the effect of imagination must be regarded as a new element, which exaggerates the effect produced by an elevation of ground.