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Rh throughout the whole plan of the War, and serve as a guide for everything else

The first is: to reduce the weight of the enemy's power into as few centres of gravity as possible, into one if it can be done; again, to confine the attack against these centres of force to as few principal undertakings as possible, to one if possible; lastly, to keep all secondary undertakings as subordinate as possible. In a word, the first principle is, to concentrate as much as possible.

The second principle runs thus—to act as swiftly as possible; therefore, to allow of no delay or detour without sufficient reason.

The reducing the enemy’s power to one central point depends—

(1) On the nature of its political connection. If it consists of Armies of one Power, there is generally no difficulty; if of allied Armies, of which one is acting simply as an ally without any interest of its own, then the difficulty is not much greater; if of a coalition for a common object, then it depends on the cordiality of the alliance; we have already treated of this subject.

(2) On the situation of the theatre of War upon which the different hostile Armies make their appearance.

If the enemy's forces are collected in one Army upon one theatre of War, they constitute in reality a unity, and we need not inquire further; if they are upon one theatre of War, but in separate Armies, which belong to different Powers, there is no longer absolute unity; there is, however, a sufficient interdependence of parts for a decisive blow upon one part to throw down the other in the concussion. If the Armies are posted in theatres of War adjoining each other, and not separated by any great natural obstacles, then there is in such case also a decided influence of the one upon the other; but if the theatres of War are wide apart, if there is neutral