It must continually be insisted upon in military history, that general actions, however decisive, are but the functions of campaigns; and that campaigns, in their turn, are but the functions of the political energies of the governments whose armies are engaged.The object of a campaign is invariably a political object, and all its military effort is, or should be, subsidiary to that political object.One human community desires to impose upon the future a political condition which another human community rejects; or each is attempting to impose upon the future, conditions irreconcilable one with the other. Until we know what those conditions are, or what is the political objective of each opponent, we cannot decide upon the success of a campaign, nor give it its true position in history.