NOTE.
Foraging parties, composed of small detachments, and which were usually intrusted to young officers, served formerly to make good officers of advanced posts; but now the army is supplied with provisions by regular contributions: it is only in a course of partisan warfare that the necessary experience can be acquired to fill these situations with success.
A chief of partisans is, to a certain extent, independent of the army. He receives neither pay nor provisions from it, and rarely succor, and is abandoned during the whole campaign to his own resources.
An officer so circumstanced must unite address with courage, and boldness with discretion, if he wishes to collect plunder without measuring the strength of his little corps with superior forces. Always harassed, always surrounded by dangers, which it is his business to foresee and surmount, a leader of partisans acquires in a short time an experience in the details of war rarely to be obtained by an officer of the line; because the latter is almost always under the guidance of superior authority, which directs the whole of his movements, while the talent and genius of the partisan are developed and sustained by a dependence on his own resources.
MAXIM LXXVII.
Generals-in-chief must be guided by their own experience, or their genius. Tactics, evolutions, the duties and knowledge of an engineer or artillery officer, may be learned in treatises, but the science of strategy is only to be acquired by experience, and by studying the campaigns of all the great captains.
Gustavus Adolphus, Turenne, and Frederick, as well as Alexander, Hannibal, and Cæsar, have all acted upon the same principles. These have been: to keep their forces united; to leave no weak part unguarded; to seize with rapidity on important points.
Such are the principles which lead to victory, and which, by inspiring terror at the reputation of your arms, will at once maintain fidelity and secure subjection.