A prince or general can best demonstrate his genius by managing a campaign exactly to suit his objectives and his resources, doing neither too much n… - Carl von Clausewitz

War therefore is an act of violence intended to compel our opponent to fulfil our will.

Surprise becomes effective when we suddenly face the enemy at one point with far more troops than he expected. This type of numerical superiority is quite distinct from numerical superiority in general: it is the most powerful medium in the art of war.

It is, therefore, not only the physical, but more frequently the mental eye which is meant in coup d’œil. Naturally, the expression, like the thing, is always more in its place in the field of tactics: still, it must not be wanting in strategy, inasmuch as in it rapid decisions are often necessary. If we strip this conception of that which the expression has given it of the over-figurative and restricted, then it amounts simply to the rapid discovery of a truth which to the ordinary mind is either not visible at all or only becomes so after long examination and reflection.