The Interest of America in Sea Power, Present and Future. Alfred Thayer Mahan
were our sea frontier as strong as it now is weak, passive self-defence, whether in trade or war, would be but a poor policy, so long as this world continues to be one of struggle and vicissitude. All around us now is strife; "the struggle of life," "the race of life," are phrases so familiar that we do not feel their significance till we stop to think about them. Everywhere nation is arrayed against nation; our own no less than others. What is our protective system but an organized warfare? In carrying it on, it is true, we have only to use certain procedures which all states now concede to be a legal exercise of the national power, even though injurious to themselves. It is lawful, they say, to do what we will with our own. Are our people, however, so unaggressive that they are likely not to want their own way in matters where their interests turn on points of disputed right, or so little sensitive as to submit quietly to encroachment by others, in quarters where they long have considered their own influence should prevail?
Our self-imposed isolation in the matter of markets, and the decline of our shipping interest in the last thirty years, have coincided singularly with an actual remoteness of this continent from the life of the rest of the world. The writer has before him a map of the North and South Atlantic oceans, showing the direction of the principal trade routes and the proportion of tonnage passing over each; and it is curious to note what deserted regions, comparatively, are the Gulf of Mexico, the Caribbean Sea, and the adjoining countries and islands. A broad band stretches from our northern Atlantic coast to the English Channel; another as broad from the British Islands to the East, through the Mediterranean and Red Sea, overflowing the borders of the latter in order to express the volume of trade. Around either cape—Good Hope and Horn—pass strips of about one-fourth this width, joining near the equator, midway between Africa and South America. From the West Indies issues a thread, indicating the present commerce of Great Britain with a region which once, in the Napoleonic wars, embraced one-fourth of the whole trade of the Empire. The significance is unmistakable: Europe has now little mercantile interest in the Caribbean Sea.
When the Isthmus is pierced, this isolation will pass away, and with it the indifference of foreign nations. From wheresoever they come and whithersoever they afterward go, all ships that use the canal will pass through the Caribbean. Whatever the effect produced upon the prosperity of the adjacent continent and islands by the thousand wants attendant upon maritime activity, around such a focus of trade will centre large commercial and political interests. To protect and develop its own, each nation will seek points of support and means of influence in a quarter where the United States always has been jealously sensitive to the intrusion of European powers. The precise value of the Monroe doctrine is understood very loosely by most Americans, but the effect of the familiar phrase has been to develop a national sensitiveness, which is a more frequent cause of war than material interests; and over disputes caused by such feelings there will preside none of the calming influence due to the moral authority of international law, with its recognized principles, for the points in dispute will be of policy, of interest, not of conceded right. Already France and Great Britain are giving to ports held by them a degree of artificial strength uncalled for by their present importance. They look to the near future. Among the islands and on the mainland there are many positions of great importance, held now by weak or unstable states. Is the United States willing to see them sold to a powerful rival? But what right will she invoke against the transfer? She can allege but one,—that of her reasonable policy supported by her might.
Whether they will or no, Americans must now begin to look outward. The growing production of the country demands it. An increasing volume of public sentiment demands it. The position of the United States, between the two Old Worlds and the two great oceans, makes the same claim, which will soon be strengthened by the creation of the new link joining the Atlantic and Pacific. The tendency will be maintained and increased by the growth of the European colonies in the Pacific, by the advancing civilization of Japan, and by the rapid peopling of our Pacific States with men who have all the aggressive spirit of the advanced line of national progress. Nowhere does a vigorous foreign policy find more favor than among the people west of the Rocky Mountains.
It has been said that, in our present state of unpreparedness, a trans-isthmian canal will be a military disaster to the United States, and especially to the Pacific coast. When the canal is finished, the Atlantic seaboard will be neither more nor less exposed than it now is; it will merely share with the country at large the increased danger of foreign complications with inadequate means to meet them. The danger of the Pacific coast will be greater by so much as the way between it and Europe is shortened through a passage which the stronger maritime power can control. The danger will lie not merely in the greater facility for despatching a hostile squadron from Europe, but also in the fact that a more powerful fleet than formerly can be maintained on that coast by a European power, because it can be called home so much more promptly in case of need. The greatest weakness of the Pacific ports, however, if wisely met by our government, will go far to insure our naval superiority there. The two chief centres, San Francisco and Puget Sound, owing to the width and the great depth of the entrances, cannot be effectively protected by torpedoes; and consequently, as fleets can always pass batteries through an unobstructed channel, they cannot obtain perfect security by means of fortifications only. Valuable as such works will be to them, they must be further garrisoned by coast-defence ships, whose part in repelling an enemy will be co-ordinated with that of the batteries. The sphere of action of such ships should not be permitted to extend far beyond the port to which they are allotted, and of whose defence they form an essential part; but within that sweep they will always be a powerful reinforcement to the sea-going navy, when the strategic conditions of a war cause hostilities to centre around their port. By sacrificing power to go long distances, the coast-defence ship gains proportionate weight of armor and guns; that is, of defensive and offensive strength. It therefore adds an element of unique value to the fleet with which it for a time acts. No foreign states, except Great Britain, have ports so near our Pacific coast as to bring it within the radius of action of their coast-defence ships; and it is very doubtful whether even Great Britain will put such ships at Vancouver Island, the chief value of which will be lost to her when the Canadian Pacific is severed,—a blow always in the power of this country. It is upon our Atlantic seaboard that the mistress of Halifax, of Bermuda, and of Jamaica will now defend Vancouver and the Canadian Pacific. In the present state of our seaboard defence she can do so absolutely. What is all Canada compared with our exposed great cities? Even were the coast fortified, she still could do so, if our navy be no stronger than is designed as yet. What harm can we do Canada proportionate to the injury we should suffer by the interruption of our coasting trade, and by a blockade of Boston, New York, the Delaware, and the Chesapeake? Such a blockade Great Britain certainly could make technically efficient, under the somewhat loose definitions of international law. Neutrals would accept it as such.
The military needs of the Pacific States, as well as their supreme importance to the whole country, are yet a matter of the future, but of a future so near that provision should begin immediately. To weigh their importance, consider what influence in the Pacific would be attributed to a nation comprising only the States of Washington, Oregon, and California, when filled with such men as now people them and still are pouring in, and which controlled such maritime centres as San Francisco, Puget Sound, and the Columbia River. Can it be counted less because they are bound by the ties of blood and close political union to the great communities of the East? But such influence, to work without jar and friction, requires underlying military readiness, like the proverbial iron hand under the velvet glove. To provide this, three things are needful: First, protection of the chief harbors, by fortifications and coast-defence ships, which gives defensive strength, provides security to the community within, and supplies the bases necessary to all military operations. Secondly, naval force, the arm of offensive power, which alone enables a country to extend its influence outward. Thirdly, it should be an inviolable resolution of our national policy, that no foreign state should henceforth acquire a coaling position within three thousand miles of San Francisco,—a distance which includes the Hawaiian and Galapagos islands and the coast of Central America. For fuel is the life of modern naval war; it is the food of the ship; without it the modern monsters of the deep die of inanition. Around it, therefore, cluster some of the most important considerations of naval strategy. In the Caribbean and in the Atlantic we are confronted with many a foreign coal depot, bidding us stand to our arms, even as Carthage bade Rome; but let us not acquiesce in an addition to our dangers,