Distant Bases.—Distant bases have two fields of usefulness which are distinct, though one implies the other; one field being merely that of supplying a fleet and offering a refuge in distress, and the other field being that of contributing thereby to offensive and defensive operations. No matter in which light we regard a distant naval base, it is clear that position, resources, and strength must be the principal factors; but as soon as we concentrate our attention on the operations that may be based upon it, we come to realize how strong a factor position, that is strategic position, is. The base itself is an inert collection of inert materials; these materials can be useful to the operations of a fleet that bases on it; but if the fleet is operating in the Pacific, a base in the Atlantic is not immediately valuable to it, no matter what strength and resources the base may have.
The functions of a home base are therefore those that the name "home" implies; to start the fleet out on its mission, to receive it on its return, and to offer rest, refuge, and succor in times of accident and distress.
The functions of a distant base concern more nearly the operations of a prolonged campaign. A distant base is more difficult to construct as a rule; largely because the fact of its distance renders engineering operations difficult and because the very excellence of its position as an outpost makes it vulnerable to direct attack and often to a concentration of attacks coming from different directions.
If naval operations are to be conducted at considerable distance from home, say in the Caribbean Sea, distant bases are necessary, since without them, the fleet will operate under a serious handicap. Under some conditions, a fleet operating in the Caribbean without a base there, against an enemy that had established a satisfactory base, might have its normal fighting efficiency reduced 50 per cent, or even more. A fleet is not a motionless fort, whose strength lies only in its ability to fire guns and withstand punishment; a fleet is a very live personality, whose ability to fight well—like a pugilist's—depends largely on its ability to move quickly and accurately, and to think quickly and accurately. The best pugilists are not usually the strongest men, though physical strength is an important factor; the best pugilists are men who are quick as well as strong, who see an advantage or a danger quickly, and whose eyes, nerves, and muscles act together swiftly and harmoniously. A modern fleet, filled with high-grade machinery of all kinds, manned by highly trained men to operate it, and commanded by officers fit to be intrusted with such responsibilities, is a highly developed and sensitive organism—and, like all highly developed and sensitive organisms, exists in a state of what may be called "unstable equilibrium." As pointed out in previous pages, the high skill needed to perform well any very difficult task can be gained only by great practice in overcoming difficulties and eliminating errors of many kinds; and when the difficulties are manifold and great, a comparatively small increase or decrease in the overcoming of them makes a great difference in the results attained. An interesting though possibly not very correct analogy is to be seen in the case of a polished surface; for we readily note that the more highly polished the surface is, the more easily it is sullied. Another analogy may be found in the performance of a great pianist or violinist; for a very small failure in his skill for even an instant will produce a painful feeling that could not be produced by a much greater failure in an ordinary performer. Another analogy is to be found in the case of a ship that is going at the upper limit of her speed; for a very minor failure of any part of her machinery will produce a much greater slowing than it would if her speed were slower.
Perhaps apologies are in order for dwelling so long on what may seem to some an academic question, but it does not seem to the writer to be academic at all. Certainly, the "condition" of a pugilist, or a fleet, about to fight, is not an academic consideration; and if it is not, no matter which affects this condition can rightfully be considered academic. The whole usefulness of bases is due to their ability to put fleets into good fighting condition and to maintain them in it; and it seems a very proper and useful thing to note that the more highly trained a fleet is, and the more highly organized the various appliances the fleet contains, the more difference results from a falling off in the condition of its personnel and material.
This shows the advantage of having a base as close to the place where a fight is going to happen as may be possible. This does not mean, of course, that a fleet should remain for long periods within its base; because a fleet, like any other practiser of any art, needs constant practice. It merely means that the closer the base is to the scene of the operations or the actual battle, the better "tuned up" the personnel and material will be. It also means that this consideration is of the highest practical importance.
Advanced Bases.—The extreme desirability of having a base near the scene of operations, even if the base be only temporarily held, has led to the use of what are called "advanced bases." An excellent and modern illustration of an advanced base is the base which the Japanese established at the Elliot Islands about sixty miles from Port Arthur, which the Japanese were besieging. The Russian fleet could issue from their base at Port Arthur whenever the Russians wished, and return to it at will. While inside, until the Japanese had landed and attacked them from the land side, the Russians could make their preparations in security and leisure, and then go out. The Japanese fleet, on the other hand, until they had established their base, were forced to remain under way at sea, and to accept action at the will of the Russians; so that, although Port Arthur was besieged, the advantages of the offensive, to some extent, resided with the Russians. The establishment of the base did not, of course, change the situation wholly; but it permitted a very considerable relaxation of vigilance and mental strain on the part of the Japanese, and a considerable easement of the motive power of their ships. Naturally, the Japanese made arrangements whereby their heavy ships could remain in comparative tranquillity near the base, while destroyers and scouts of various kinds kept touch with Port Arthur, and notified the base by wireless of any probable sortie by the Russian fleet.
The temporary advanced base at the Elliot Islands was, as temporary advanced bases always must be, quite incomplete in every way as compared with the permanent bases at home. It fulfilled its mission, however, and was in fact as good a base as really was required. The strategic ability of the Japanese was indicated quite early in the war by the promptness and skill with which they established this base.
Of course, all advanced bases are distant bases, but the words usually imply temporariness, as does in fact the word "advance." An instance of an advanced base that has been far from temporary is the island of Jamaica, and another is the island of Bermuda; another is Malta, and still another is Gibraltar. These bases form stepping-stones, by which Great Britain's navy may go by easy stages from one position to another, stopping at a base when desired, or going beyond it without stopping, secure in the knowledge that the base is "under her lee" in case of accident or distress.
Viewed from the standpoint of operations in an actual war, the strategic value of a certain position for a base is important, no matter whether the operations are offensive or defensive; and the same factors that make a position good for defensive operations make it good for offensive operations also. For instance, if we wish to send a fleet on a hostile expedition to a distant point, it is well to have a base on a salient as far out as practicable from the coast, in order that the fleet may be able to start, full of fuel and supplies, from a place near the distant point; and equally, if we are to receive an attack upon the coast, it is well to have a base far out, in order to embarrass the transit of the enemy toward our coast, by the threat—first against his flank, and later against his rear and his communications. Naval bases looked at from this point of view resemble those forts that European nations place along their frontiers.