CHAPTER XXX. Defence of a Theatre of War ( continued ) When no Decision is Sought for.

The covering of a country by an extended disposition of forces, is only conceivable in combination with very considerable obstacles of ground. The great and small posts which must be formed for the purpose, can only get a certain capability of resistance through strength of position; and as natural obstacles are seldom found sufficient, therefore field fortification is made use of as an assistance. But now it is to be observed that, the power of resistance which is thus obtained at any one point, is always only relative (see the chapter on the signification of the combat), and never to be regarded as absolute. It may certainly happen that one such post may remain proof against all attacks made upon it, and that therefore in a single instance there may be an absolute result; but from the great number of posts, any single one, in comparison to the whole, appears weak, and exposed to the possible attack of an overwhelming force, and consequently it would be unreasonable to place one’s dependence for safety on the resistance of any one single post. In such an extended position, we can therefore only count on a resistance of relative length, and not upon a victory, properly speaking. This value of single posts, at the same time, is also sufficient for the object, and for a general calculation. In campaigns in which no great decision, no irresistible march, towards the complete subjugation of the whole force is to be feared, there is little risk in a combat of posts, even if it ends in the loss of a post. There is seldom any further result in connection with it than the loss of the post and a few trophies; the influence of victory penetrates no further into the situation of affairs, it does not tear down any part of the foundation to be followed by a mass of building in ruin. In the worst case, if, for instance, the whole defensive system is disorganised by the loss of a single post, the defender has always time to concentrate his corps, and with his whole force to offer battle, which the assailant, according to our supposition, does not desire. Therefore also it usually happens that with this concentration of force the act closes, and the further advance of the assailant is stopped. A strip of land, a few men and guns, are the losses of the defender, and with these results the assailant is satisfied.