The wants of an army may be divided into two classes, first those which every cultivated country can furnish; and next those which can only be obtained from those localities where they are produced. The first are chiefly provisions, the second the means of keeping an army complete in every way. The first can therefore be obtained in the enemy’s country; the second, as a rule, can only be furnished by our own country, for example men, arms, and almost all munitions of war. Although there are exceptions to this classification in certain cases, still they are few and trifling, and the distinction we have drawn is of standing importance, and proves again that the communication with our own country is indispensable. Depôts of provisions and forage are generally formed in open towns, both in the enemy’s and in our own country, because there are not as many fortresses as would be required for these bulky stores continually being consumed, and wanted sometimes here, sometimes there, and also because their loss is much easier to replace; on the other hand, stores to keep the army complete, such as arms, munition of war, and articles of equipment are never lodged in open places in the vicinity of the theatre of war if it can be avoided, but are rather brought from a distance, and in the enemy’s country never stored anywhere but in fortresses. From this point, again, it may be inferred that the base is of more importance in relation to supplies intended to refit an army than in relation to provisions for food. Now, the more means of each kind are collected together in great magazines before being brought into use, the more, therefore, all separate streams unite in great reservoirs, so much the more may these be regarded as taking the place of the whole country, and so much the more will the conception of a base fix itself upon these great depôts of supply; but this must never go so far that any such place becomes looked upon as constituting a base in itself alone.