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with it, as with Art in general, the leading principles remain unimpaired from age to age. When recognized and truly mastered, not held by a passive acquiescence in the statements of another, but really appropriated, so as to enter decisively into a man's habit of thought, forming in that direction the fibre of his mind, they not only illuminate conditions apparently novel, by revealing the essential analogies between them and the past, but they supply the clue by which the intricacies of the present can best be threaded. Nothing could be more utterly superficial, for instance, than the remark of a popular writer that "the days of tacks and sheets"—of sailing ships, that is—"have no value as lessons for the days of steam and armor." Contrast with such an utterance the saying of the great master of the art,—Napoleon: "If a man will surprise the secrets of warfare, let him study the campaigns of Hannibal and of Cæsar, as well as those of Frederick the Great and my own."

      Comprehension of warfare, therefore, consists, first, in the apprehension and acceptance—the mental grasp—of a few simple general principles, elucidated and formulated by admitted authorities upon the subject, and, second, in copious illustration of these principles by the application of them to numerous specific instances, drawn from actual experiences of war—from history. Such illustration, adequately developed by exposition of facts and of principles in the several cases, pointing out, where necessary, substantial identity underlying superficial diversity, establishes gradually a body of precedents, which reinforce, by all the weight of cumulative authority, the principle that they illuminate. Thus is laid the substantial foundation upon which the Art of War securely rests. It is perhaps advisable—though it should be needless—to say that, when a student has achieved such comprehension, when his mind has mastered the principles, and his memory is richly stored with well-ordered precedents, he is, in war, as in all other active pursuits of life, but at the beginning of his labors. He has girded on his armor, but he has not yet proved it,—far less is qualified to boast as one about to put it off after a good life's fight. It remains yet to be seen whether he has the gifts and the manhood to use that which he has laboriously acquired, or whether, as happens with many other men apparently well qualified, and actually well furnished with the raw material of knowledge in various professions, he will be unable to turn power into success. This question trial alone can decide in each individual case; but while experience thus forces all to realize that knowledge does not necessarily imply capacity to use it, that there may be foundation upon which no superstructure will be raised, few—and those not the wisest—are inclined to dispute that antecedent training, well-ordered equipment, where other things are equal, does give a distinct advantage to the man who has received it. The blaze of glory and of success which, after forty years of patient waiting, crowned the last six months of Havelock's life, raising him from obscurity to a place among the immortals, attests the rapidity with which the perfect flower of achievement can bud and fully bloom, when, and only when, good seed has been sown in ground fitly prepared.

      There are two principal methods of imparting the illustrations that, in their entirety, compose the body of precedents, by which the primary teachings of the Art of War are at once elucidated and established. By the first, the several principles may be separately stated, more or less at large, each being followed closely by the appropriate illustrations, drawn, as these in such a treatment most suitably may, from different periods and from conditions which on the surface appear most divergent. Or, on the other hand, the consecutive narrative of a particular series of operations may be given, in such detail as is necessary, accompanied by a running commentary or criticism, in which the successive occurrences are brought to the test of recognized standards; inference being drawn, or judgment passed, accordingly. The former is the more formal and methodical; it serves better, perhaps, for starting upon his career the beginner who proposes to make war the profession of his life; for it provides him, in a compact and systematic manner, with certain brief rules, by the use of which he can most readily apply, to his subsequent reading of military history, criteria drawn from the experience of centuries. He is thus supplied, in short, with digested knowledge. But digestion by other minds can in no wise take the place of assimilation performed by one's own mental processes. The cut and dried information of the lecture room, and of the treatise, must in every profession be supplemented by the hard work of personal practice; and failing the experience of the campaign,—of actual warfare,—the one school of progress for the soldier or seaman is to be found in the study of military and naval history, which embodies the experience of others. To such study the second method contributes; it bears to the first the relation of an advanced course.

      Nor let it be supposed that the experience of others, thus imparted, is a poor substitute for that acquired by the actual hard work of the field, or of the ocean. By the process, the fruit possibly may not be fully matured; but it arrives at that perfection of form which requires but a few suns to ripen. This, moreover, if not the only way by which experience in the art of directing operations of war—of command-in-chief—can be stored, is by far the most comprehensive and thorough; for while utility cannot be denied to annual manœuvres, and to the practice of the sham battle, it must be remembered that these, dealing with circumstances limited both in time and place, give a very narrow range of observation; and, still more important, as was remarked by the late General Sherman, the moral elements of danger and uncertainty, which count for so much in real warfare, cannot be adequately reproduced in mimic. The field of military history, on the other hand, has no limit short of the military experience of the race; it records the effect of moral influences of every kind, as well as of the most diverse material conditions; the personal observation of even the greatest of captains is in comparison but narrow. "What experience of command," says one of the most eminent, "can a general have, before he is called to command? and the experience of what one commander, even after years of warfare, can cover all cases?" Therefore he prescribes study; and as a help thereto tells the story of one of his most successful campaigns, accompanying it with a commentary in which he by no means spares himself. Napoleon abounds in the same sense. "On the field of battle the happiest inspiration is often but a recollection,"—not necessarily of one's own past; and he admitted in after years that no finer work had been done by him than in his first campaign, to which he came—a genius indeed, but—with the acquisitions chiefly of a student, deep-steeped in reading and reflection upon the history of warfare.

      The utility of such study of military history to the intending warrior is established, not only by a few such eminent authorities, but by a consensus among the leading soldiers and seamen of our own day, whether they personally have, or have not, had the opportunity of command in war. It may be asserted to be a matter of contemporary professional agreement, as much as any other current opinion that now obtains. In such study, native individual capacity and individual temperament will largely affect inference and opinion; not only causing them to differ more or less, but resulting frequently in direct opposition of conclusion. It cannot be otherwise; for, like all other callings of active life, war is a matter, not merely of knowledge and of general principles, but of sound judgment, without which both information and rules, being wrongly applied, become useless. Opinions, even of the most eminent, while accorded the respect due to their reputation, should therefore be brought to the test of personal reflection.

      The study of the Art and History of War is pre-eminently necessary to men of the profession, but there are reasons which commend it also, suitably presented, to all citizens of our country. Questions connected with war—when resort to war is justifiable, preparation for war, the conduct of war—are questions of national moment, in which each voter—nay, each talker—has an influence for intelligent and adequate action, by the formation of sound public opinion; and public opinion, in operation, constitutes national policy. Hence it is greatly to be desired that there should be more diffused interest in the critical study of warfare in its broader lines. Knowledge of technical details is not necessary to the apprehension of the greater general principles, nor to an understanding of the application of those principles to particular cases, when made by individual students,—officers or others. The remark is sometimes heard, "When military or naval officers agree, Congress—or the people—may be expected to act." The same idea applied to other professions—waiting for universal agreement—would bring the world to a standstill. Better must be accepted without waiting for best. Better is more worth having to-day than best is the day after the need has come and gone. Hesitation and inaction, continued till the doctors agree, may result in the death of the patient; yet such hesitation is almost inevitable where there is no formed public

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