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Carl von Clausewitz: Excerpts from On War (1832)

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These are the ways in which preponderance of one arm or another will affect the operational conduct of a war; yet they are seldom so complete or decisive that they play the only, or the principal, part in determining the nature of the whole operation. Whether one selects the instrument of strategic attack or of defense, one theater of operations or another, a major battle or some other method of destruction, will probably depend on other, weightier arguments. Where this is not so, we are afraid that nonessentials have taken the place of essentials. But even in cases where the major issues have already been decided on the basis of other reasons, a certain amount of latitude remains in which preponderance in one branch can exert its influence. It is possible to be prudent and methodical in attack, and bold and enterprising in defense, and so on through every possible phase and nuance of military activity.

Conversely, the nature of a war can greatly affect the proportions of the arms of the service.

First, a peoples war, based on militia and home guard, will naturally involve large numbers of infantry. This means a shortage of equipment rather than of men, and equipment will be limited to the barest necessities. It is therefore quite possible to raise not one, but two or three battalions for every eight-gun battery.

Second, where the opposing sides are unevenly matched and the weaker is unable to resort to arming the people, or, what amounts to almost the same thing, raising a militia, an increase in artillery is certainly the fastest means of bolstering its forces and bringing about some sort of balance. One can thereby save manpower while intensifying the principal element of the forces, that is their destructive power. In any case such operations will probably be limited to a small theater, for which artillery will also be most appropriate. Frederick the Great relied on this means in the latter part of the Seven Years War.

Third, cavalry is suited to movement and major decisions. Therefore, its preponderance is important in operations over great distances, and in cases where one expects to carry out major and decisive blows. Bonaparte will serve as an example.

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