Some Principles of Maritime Strategy

The expression "Limited war" is no doubt not entirely happy. Yet no other has been found to condense the ideas of limited object and limited interest, which are its special characteristics. Still if the above example be kept in mind as a typical case, the meaning of the term will not be mistaken. It only remains to emphasise one important point. The fact that the doctrine of limited war traverses the current belief that our primary objective must always be the enemy's armed forces is liable to carry with it a false inference that it also rejects the corollary that war means the use of battles. Nothing is further from the conception. Whatever the form of war, there is no likelihood of our ever going back to the old fallacy of attempting to decide wars by manoeuvres. All forms alike demand the use of battles. By our fundamental theory war is always "a continuation of political intercourse, in which fighting is substituted for writing notes." However great the controlling influence of the political object, it must never obscure the fact that it is by fighting we have to gain our end.

It is the more necessary to insist on this point, for the idea of making a piece of territory your object is liable to be confused with the older method of conducting war, in which armies were content to manoeuvre for strategical positions, and a battle came almost to be regarded as a mark of bad generalship. With such parading limited war has nothing to do. Its conduct differs only from that of unlimited war in that instead of having to destroy our enemy's whole power of resistance, we need only overthrow so much of his active force as he is able or willing to bring to bear in order to prevent or terminate our occupation of the territorial object.

The first consideration, then, in entering on such a war is to endeavour to determine what the force will amount to. It will depend, firstly, on the importance the enemy attaches to the limited object, coupled with the nature and extent of his preoccupations elsewhere, and, secondly, it will depend upon the natural difficulties of his lines of communication and the extent to which we can increase those difficulties by our conduct of the initial operations. In favourable circumstances therefore (and here lies the great value of the limited form) we are able to control the amount of force we shall have to encounter. The most favourable circumstances and the only circumstances by which we ourselves can profit are such as permit the more or less complete isolation of the object by naval action, and such isolation can never be established until we have entirely overthrown the enemy's naval forces.

Here, then, we enter the field of naval strategy. We can now leave behind us the theory of war in general and, in order to pave the way to our final conclusions, devote our attention to the theory of naval warfare in particular.

PART TWO

THEORY OF NAVAL WAR

CHAPTER ONE

THEORY OF THE OBJECT—COMMAND OF THE SEA

The object of naval warfare must always be directly or indirectly either to secure the command of the sea or to prevent the enemy from securing it.

The second part of the proposition should be noted with special care in order to exclude a habit of thought, which is one of the commonest sources of error in naval speculation. That error is the very general assumption that if one belligerent loses the command of the sea it passes at once to the other belligerent. The most cursory study of naval history is enough to reveal the falseness of such an assumption. It tells us that the most common situation in naval war is that neither side has the command; that the normal position is not a commanded sea, but an uncommanded sea. The mere assertion, which no one denies, that the object of naval warfare is to get command of the sea actually connotes the proposition that the command is normally in dispute. It is this state of dispute with which naval strategy is most nearly concerned, for when the command is lost or won pure naval strategy comes to an end.

This truth is so obvious that it would scarcely be worth mentioning were it not for the constant recurrence of such phrases as: "If England were to lose command of the sea, it would be all over with her." The fallacy of the idea is that it ignores the power of the strategical defensive. It assumes that if in the face of some extraordinary hostile coalition or through some extraordinary mischance we found ourselves without sufficient strength to keep the command, we should therefore be too weak to prevent the enemy getting it—a negation of the whole theory of war, which at least requires further support than it ever receives.

And not only is this assumption a negation of theory; it is a negation both of practical experience and of the expressed opinion of our greatest masters. We ourselves have used the defensive at sea with success, as under William the Third and in the War of American Independence, while in our long wars with France she habitually used it in such a way that sometimes for years, though we had a substantial preponderance, we could not get command, and for years were unable to carry out our war plan without serious interruption from her fleet.

So far from the defensive being a negligible factor at sea, or even the mere pestilent heresy it is generally represented, it is of course inherent in all war, and, as we have seen, the paramount questions of strategy both at sea and on land turn on the relative possibilities of offensive and defensive, and upon the relative proportions in which each should enter into our plan of war. At sea the most powerful and aggressively-minded belligerent can no more avoid his alternating periods of defence, which result from inevitable arrests of offensive action, than they can be avoided on land. The defensive, then, has to be considered; but before we are in a position to do so with profit, we have to proceed with our analysis of the phrase, "Command of the Sea," and ascertain exactly what it is we mean by it in war.

In the first place, "Command of the Sea" is not identical in its strategical conditions with the conquest of territory. You cannot argue from the one to the other, as has been too commonly done. Such phrases as the "Conquest of water territory" and "Making the enemy's coast our frontier" had their use and meaning in the mouths of those who framed them, but they are really little but rhetorical expressions founded on false analogy, and false analogy is not a secure basis for a theory of war.

The analogy is false for two reasons, both of which enter materially into the conduct of naval war. You cannot conquer sea because it is not susceptible of ownership, at least outside territorial waters. You cannot, as lawyers say, "reduce it into possession," because you cannot exclude neutrals from it as you can from territory you conquer. In the second place, you cannot subsist your armed force upon it as you can upon enemy's territory. Clearly, then, to make deductions from an assumption that command of the sea is analogous to conquest of territory is unscientific, and certain to lead to error.

The only safe method is to inquire what it is we can secure for ourselves, and what it is we can deny the enemy by command of the sea. Now, if we exclude fishery rights, which are irrelevant to the present matter, the only right we or our enemy can have on the sea is the right of passage; in other words, the only positive value which the high seas have for national life is as a means of communication. For the active life of a nation such means may stand for much or it may stand for little, but to every maritime State it has some value. Consequently by denying an enemy this means of passage we check the movement of his national life at sea in the same kind of way that we check it on land by occupying his territory. So far the analogy holds good, but no further.

So much for the positive value which the sea has in national life. It has also a negative value. For not only is it a means of communication, but, unlike the means of communication ashore, it is also a barrier. By winning command of the sea we remove that barrier from our own path, thereby placing ourselves in position to exert direct military pressure upon the national life of our enemy ashore, while at the same time we solidify it against him and prevent his exerting direct military pressure upon ourselves.

Command of the sea, therefore, means nothing but the control of maritime communications, whether for commercial or military purposes. The object of naval warfare is the control of communications, and not, as in land warfare, the conquest of territory. The difference is fundamental. True, it is rightly said that strategy ashore is mainly a question of communications, but they are communications in another sense. The phrase refers to the communications of the army alone, and not to the wider communications which are part of the life of the nation.

But on land also there are communications of a kind which are essential to national life—the internal communications which connect the points of distribution. Here again we touch an analogy between the two kinds of war. Land warfare, as the most devoted adherents of the modern view admit, cannot attain its end by military victories alone. The destruction of your enemy's forces will not avail for certain unless you have in reserve sufficient force to complete the occupation of his inland communications and principal points of distribution. This power is the real fruit of victory, the power to strangle the whole national life. It is not until this is done that a high-spirited nation, whose whole heart is in the war, will consent to make peace and do your will. It is precisely in the same way that the command of the sea works towards peace, though of course in a far less coercive manner, against a continental State. By occupying her maritime communications and closing the points of distribution in which they terminate we destroy the national life afloat, and thereby check the vitality of that life ashore so far as the one is dependent on the other. Thus we see that so long as we retain the power and right to stop maritime communications, the analogy between command of the sea and the conquest of territory is in this aspect very close. And the analogy is of the utmost practical importance, for on it turns the most burning question of maritime war, which it will be well to deal with in this place.

It is obvious that if the object and end of naval warfare is the control of communications it must carry with it the right to forbid, if we can, the passage of both public and private property upon the sea. Now the only means we have of enforcing such control of commercial communications at sea is in the last resort the capture or destruction of sea-borne property. Such capture or destruction is the penalty which we impose upon our enemy for attempting to use the communications of which he does not hold the control. In the language of jurisprudence, it is the ultimate sanction of the interdict which we are seeking to enforce. The current term "Commerce destruction" is not in fact a logical expression of the strategical idea. To make the position clear we should say "Commerce prevention."

The methods of this "Commerce prevention" have no more connection with the old and barbarous idea of plunder and reprisal than orderly requisitions ashore have with the old idea of plunder and ravaging. No form of war indeed causes so little human suffering as the capture of property at sea. It is more akin to process of law, such as distress for rent, or execution of judgment, or arrest of a ship, than to a military operation. Once, it is true, it was not so. In the days of privateers it was accompanied too often, and particularly in the Mediterranean and the West Indies, with lamentable cruelty and lawlessness, and the existence of such abuses was the real reason for the general agreement to the Declaration of Paris by which privateering was abolished.

But it was not the only reason. The idea of privateering was a survival of a primitive and unscientific conception of war, which was governed mainly by a general notion of doing your enemy as much damage as possible and making reprisal for wrongs he had done you. To the same class of ideas belonged the practice of plunder and ravaging ashore. But neither of these methods of war was abolished for humanitarian reasons. They disappeared indeed as a general practice before the world had begun to talk of humanity. They were abolished because war became more scientific. The right to plunder and ravage was not denied. But plunder was found to demoralise your troops and unfit them for fighting, and ravaging proved to be a less powerful means of coercing your enemy than exploiting the occupied country by means of regular requisitions for the supply of your own army and the increase of its offensive range. In short, the reform arose from a desire to husband your enemy's resources for your own use instead of wantonly wasting them.

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1

Clausewitz, On War, p. ix. The references are to Colonel Graham's translation of the third German edition, but his wording is not always followed exactly.

2

Clausewitz, On War, Book viii, chap, ii

3

Ibid, Preparatory Notice, p. vii.

4

Ibid, p. viii

5

Wellington's view of the essential factor was expressed to Rear Admiral Martin, who was sent to Spain by the Admiralty to confer with him in September 1813. "If anyone," he said, "wishes to know the history of this war, I will tell them it is our maritime superiority gives me the power of maintaining my army while the enemy are unable to do so." (Letters of Sir T. Byam Martin) [Navy Records Society], ii, p. 499.

6

Correspondance de Napoléon, xix, 421, 4 September.

7

Development of Strategical Science.

8

The strategical object with which the Baltic fleet was sent was certainly to prevent a counter-stroke—that is, its main function in our war plan was negative. Its positive function was minor and diversionary only. It also had a political object as a demonstration to further our efforts to form a Baltic coalition against Russia, which entirely failed. Public opinion mistaking the whole situation expected direct positive results from this fleet, even the capture of St. Petersburg. Such an operation would have converted the war from a limited one to an unlimited one. It would have meant the "overthrow of the enemy," a task quite beyond the strength of the allies without the assistance of the Baltic Powers, and even so their assistance would not have justified changing the nature of the war, unless both Sweden and Russia had been ready to make unlimited war and nothing was further from their intention.