Note 11 — XIII SALTILLO, PARRAS, TAMPICO August—December, 1846

The celebrated military writer, Clausewitz, on whose work our present views of strategy are principally founded, recognized two distinct kinds of war: that aiming to overthrow the enemy’s forces, and that aiming to make conquests on the frontier, either to be held permanently or to be used in exchanges on the settlement of peace (Clausewitz, Vom Kriege, nachricht, par. 1; Donat, Strat. Science, 112). Polk aimed to accomplish both ends by having the main army bring Mexico to terms, and at the same time taking possession of territory; but he did not apply the principle understandingly. He overrated the influence that the occupation of the northern provinces would have on the Mexican government; he thought peace was near at hand, and was figuring on the terms of a treaty when he should have been taking steps to bring Mexico speedily to the point of making a treaty; and he ordered this expedition without knowing the conditions under which it would have to be conducted in Mexico, and without asking proper expert advice. The occupation of the frontier provinces would have been sagacious had it been part of a strong coercive military policy. Quotation at the end of the second paragraph: Meade, Letters, i, 152.