Alfred Thayer Mahan

The Influence of Sea Power upon History


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and up to this day, has been effectively directed solely to what has been called the first link in the chain which makes sea power. Internal development, great production, with the accompanying aim and boast of self-sufficingness, such has been the object, such to some extent the result. In this the government has faithfully reflected the bent of the controlling elements of the country, though it is not always easy to feel that such controlling elements are truly representative, even in a free country. However that may he, there is no doubt that, besides having no colonies, the intermediate link of a peaceful shipping, and the interests involved in it, are now likewise lacking. In short, the United States has only one link of the three.

      The circumstances of naval war have changed so much within the last hundred years, that it may be doubted whether such disastrous effects on the one hand, or such brilliant prosperity on the other, as were seen in the wars between England and France, could now recur. In her secure and haughty sway of the seas England imposed a yoke on neutrals which will never again be borne; and the principle that the flag covers the goods is forever secured. The commerce of a belligerent can therefore now be safely carried on in neutral ships, except when contraband of war or to blockaded ports; and as regards the latter, it is also certain that there will be no more paper blockades. Putting aside therefore the question of defending her seaports from capture or contribution, as to which there is practical unanimity in theory and entire indifference in practice, what need has the United States of sea power? Her commerce is even now carried on by others; why should her people desire that which, if possessed, must be defended at great cost? So far as this question is economical, it is outside the scope of this work; but conditions which may entail suffering and loss on the country by war are directly pertinent to it. Granting therefore that the foreign trade of the United States, going and coming, is on board ships which an enemy cannot touch except when bound to a blockaded port, what will constitute an efficient blockade? The present definition is, that it is such as to constitute a manifest danger to a vessel seeking to enter or leave the port. This is evidently very elastic. Many can remember that during the Civil War, after a night attack on the United States fleet off Charleston, the Confederates next morning sent out a steamer with some foreign consuls on board, who so far satisfied themselves that no blockading vessel was in sight that they issued a declaration to that effect. On the strength of this declaration some Southern authorities claimed that the blockade was technically broken, and could not be technically re-established without a new notification. Is it necessary, to constitute a real danger to blockade-runners, that the blockading fleet should be in sight? Half a dozen fast steamers, cruising twenty miles off-shore between the New Jersey and Long Island coast, would be a very real danger to ships seeking to go in or out by the principal entrance to New York; and similar positions might effectively blockade Boston, the Delaware, and the Chesapeake. The main body of the blockading fleet, prepared not only to capture merchant-ships but to resist military attempts to break the blockade, need not be within sight, nor in a position known to the shore. The bulk of Nelson's fleet was fifty miles from Cadiz two days before Trafalgar, with a small detachment watching close to the harbor. The allied fleet began to get under way at 7 A.m., and Nelson, even under the conditions of those days, knew it by 9.30. The English fleet at that distance was a very real danger to its enemy. It seems possible, in these days of submarine telegraphs, that the blockading forces in-shore and off-shore, and from one port to another, might be in telegraphic communication with one another along the whole coast of the United States, readily giving mutual support; and if, by some fortunate military combination, one detachment were attacked in force, it could warn the others and retreat upon them. Granting that such a blockade off one port were broken on one day, by fairly driving away the ships maintaining it, the notification of its being re-established could be cabled all over the world the next. To avoid such blockades there must be a military force afloat that will at all times so endanger a blockading fleet that it can by no means keep its place. Then neutral ships, except those laden with contraband of war, can come and go freely, and maintain the commercial relations of the country with the world outside.

      Here concludes the general discussion of the principal elements which affect, favorably or unfavorably, the growth of sea power in nations. The aim has been, first to consider those elements in their natural tendency for or against, and then to illustrate by particular examples and by the experience of the past. Such discussions, while undoubtedly embracing a wider field, yet fall mainly within the province of strategy, as distinguished from tactics. The considerations and principles which enter into them belong to the unchangeable, or unchanging, order of things, remaining the same, in cause and effect, from age to age. They belong, as it were, to the Order of Nature, of whose stability so much is heard in our day; whereas tactics, using as its instruments the weapons made by man, shares in the change and progress of the race from generation to generation. From time to time the superstructure of tactics has to be altered or wholly torn down but the old foundations of strategy so far remain, as though laid upon a rock. There will next be examined the general history of Europe and America, with particular reference to the effect exercised upon that history, and upon the welfare of the people, by sea power in its broad sense. From time to time, as occasion offers, the aim will be to recall and reinforce the general teaching, already elicited, by particular illustrations. The general tenor of the study will therefore be strategical, in that broad