The United States navy, to which is committed the naval defense of the United States, has followed the same lines as the British; and its task, while in some ways easier, is in other ways more difficult. Perhaps the chief reason why the naval defense of Great Britain is so difficult is the extreme closeness of her borders to the borders of her possible foes—for the English Channel is only twenty-three miles across from Dover to Calais. And yet the very narrowness of the Channel there lends a certain element of assistance to the defender of either coast against an enemy like Germany, because it enables the defender, by simply protecting that narrow area, to prevent an enemy from passing to the sea or from it, except by going around the British Isles. But while it is interesting thus to compare the tasks of two navies by comparing the lengths of coast line, populations, wealth, and areas of their countries, or their distances from possible antagonists, such comparisons are really misleading; for the reason that all nations are on a par in regard to the paramount element of national defense, which is defense of national policy. It was as important to Belgium as it was to Germany to maintain the national policy, and the army of Belgium was approximately as strong as that of Germany in proportion to her wealth, area, and population; but nevertheless the Belgium army was routed, and Belgium was conquered by the German army.
Much has been written to prove that the sole reason for the possession of the paramount navy by Great Britain is that the soil of Great Britain cannot support her people. In an essay, entitled "Naval Power," which I contributed to the United States Naval Institute in 1911, the fallacy of this was shown; and it was pointed out that even if Great Britain grew more than enough to feed her people, life could be made unendurable to the 60,000,000 living there (or to the people in any civilized and isolated country) by an effective blockading fleet. The question of how great a navy any country needs depends, not on the size, but on the policies of that country, and on the navies of the countries that may oppose those policies. The navy that a country needs is a navy that can defend its policies, both offensively and defensively. If, for instance, the United States does not wish to enforce any policy that Great Britain would oppose, or to oppose any policy that Great Britain would enforce, then we may leave her navy out of consideration. But if we decide that we must maintain a certain policy which a certain country may oppose, then we must have a navy at least equal to hers; because we do not know whether we should have to meet that navy near our coast, or near hers, or far away from both. For the reason, furthermore, that a war with a European Power might occur at a period of strained relations with some Asiatic Power, we must realize the temptation to that Asiatic Power to seize the opportunity and attack us on the Pacific side, knowing that we should need all our navy on the Atlantic side. This seems to mean that in order to have an effective naval defense (since we are precluded by our policy from having European allies and no South American country could give us any effective naval help) we must have on each ocean a fleet as strong as that of any nation on that ocean against whose wishes we may have to enforce a policy—or against whose policy we may have to oppose resistance.
The essential requirement of any defense is that it shall be adequate; because an inadequate defense will be broken down, while the attack will retain a large proportion of its original strength. In the United States Naval Institute, in 1905, the present writer showed, by means of a series of tables, how, when two forces fight, the force which is originally the more powerful will become gradually more powerful, relatively to the weaker, as the fight goes on. That, for instance, if two forces start with the relative powers of 10 and 8, the weaker force will be reduced so much more rapidly than the stronger that when it has been reduced to zero the stronger force will have a value of 5.69. The values mentioned indicated the actual fighting strength—strength made up of all the factors—material, physical, and psychic—that constituted it. Of course, none of these factors can ever be accurately compared; but nevertheless the tables seemed to prove that in a contest between two forces whose total strengths are as 10 and 8 one force will be reduced to zero, while the other will be reduced not quite one-half.
One of the lessons drawn was "the folly of ineffectual resistance." Doubtless a clearer lesson would have been "the folly of ineffectual preparedness"; because, when the decision as to resistance or non-resistance is forced upon a nation, the matter is so urgent, the military, political, and international conditions so complex, and the excitement probably so intense, that a wise decision is very difficult to reach; whereas the question of what constitutes effectual preparedness is simple, and needs merely to be approached with calm nerves and an open mind.
Inasmuch as the psychic element in defense is the strongest single element, it is apparent that if the decision is reached to prepare an effectual defense the nation must be absolutely united, and must appreciate at its full value the debilitating influence of opposition to the measure; for, no matter how much money a nation may expend, no matter how many lives it may sacrifice, its defense cannot have an efficiency proportional to the effort if a considerable number of its citizens are permitted to oppose it.
In our own country there has been so much talking and writing recently about defense, that there is danger of the question coming to be considered academic; though no question is more practical, no question is more urgent.
Defense must defend.
[CHAPTER VI]
NAVAL POLICY
Every country that has a satisfactory navy has acquired it as the result of a far-seeing naval policy, not of opportunism or of chance. The country has first studied the question thoroughly, then decided what it ought to do, then decided how to do it.