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On War

Carl von Clausewitz · c. 1816–1830 (work compiled/rewritten across these years) primary

passage 162 of 539 · BOOK I. ON THE NATURE OF WAR > CHAPTER VII. Decision of the Combat (1/6)

in brief
He argues no battle is decided instantly, but rather through a progression to a critical time when renewed fighting becomes a new battle, illustrated by contrasting Prussian failures at Jena and Auerstadt in 1806.

No battle is decided in a single moment, although in every battle there arise moments of crisis, on which the result depends. The loss of a battle is, therefore, a gradual falling of the scale. But there is in every combat a point of time (*)

(*) Under the then existing conditions of armament understood. This point is of supreme importance, as practically the whole conduct of a great battle depends on a correct solution of this question—viz., How long can a given command prolong its resistance? If this is incorrectly answered in practice—the whole manœuvre depending on it may collapse—e.g., Kouroupatkin at Liao-Yang, September 1904.

when it may be regarded as decided, in such a way that the renewal of the fight would be a new battle, not a continuation of the old one. To have a clear notion on this point of time, is very important, in order to be able to decide whether, with the prompt assistance of reinforcements, the combat can again be resumed with advantage.

Often in combats which are beyond restoration new forces are sacrificed in vain; often through neglect the decision has not been seized when it might easily have been secured. Here are two examples, which could not be more to the point:

When the Prince of Hohenlohe, in 1806, at Jena,(*) with 35,000 men opposed to from 60,000 to 70,000, under Buonaparte, had accepted battle, and lost it—but lost it in such a way that the 35,000 might be regarded as dissolved—General Rüchel undertook to renew the fight with about 12,000; the consequence was that in a moment his force was scattered in like manner.

(*) October 14, 1806.

On the other hand, on the same day at Auerstadt, the Prussians maintained a combat with 25,000, against Davoust, who had 28,000, until mid-day, without success, it is true, but still without the force being reduced to a state of dissolution without even greater loss than the enemy, who was very deficient in cavalry;—but they neglected to use the reserve of 18,000, under General Kalkreuth, to restore the battle which, under these circumstances, it would have been impossible to lose.

Each combat is a whole in which the partial combats combine themselves into one total result. In this total result lies the decision of the combat. This success need not be exactly a victory such as we have denoted in the sixth chapter, for often the preparations for that have not been made, often there is no opportunity if the enemy gives way too soon, and in most cases the decision, even when the resistance has been obstinate, takes place before such a degree of success is attained as would completely satisfy the idea of a victory.

We therefore ask, Which is commonly the moment of the decision, that is to say, that moment when a fresh, effective, of course not disproportionate, force, can no longer turn a disadvantageous battle?

If we pass over false attacks, which in accordance with their nature are properly without decision, then,

  1. If the possession of a movable object was the object of the combat, the loss of the same is always the decision.

  2. If the possession of ground was the object of the combat, then the decision generally lies in its loss. Still not always, only if this ground is of peculiar strength, ground which is easy to pass over, however important it may be in other respects, can be re-taken without much danger.

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topics: battle and tactics · strategy and the aims of war

On War · Carl von Clausewitz · 1816–1830