It is natural to enquire how far Admiral Mahan's pronouncement on commerce destruction is true to-day. "The harassment and distress caused to a country by serious interference with its commerce will be conceded by all. It is doubtless a most important secondary operation of naval war, and is not likely to be abandoned till war itself shall cease: but regarded as a primary and fundamental measure, sufficient in itself to crush an enemy, it is probably a delusion, when presented in the fascinating garb of cheapness to the representatives of a people. Especially is it misleading when the nation against whom it is directed possesses, as Great Britain did and does, the two requisites of a strong sea power—a widespread healthy commerce and a powerful Navy." Has the advent of the submarine fundamentally altered the situation? "No," we may answer with confidence, if the rules of international law be observed. If these be thrown aside there remains, until the event decides, room for much argument.
To the most casual observer it seems now obvious enough that the vulnerable point in the formidable power of the Alliance opposed to Germany lay in the length and character of its sea communications. But the German Higher Command, soldiers most of them, took long to realise it. Land power must outmatch sea power, they reckoned. "Moltke," announced the Tageblatt triumphantly, "has conquered Mahan." Doubtless to harass British trade was expedient, and it had in the plans been marked down for attack. High hopes were entertained of a guerre de course conducted by armed cruisers in distant seas. Any impoverishment of the enemy is grist to the mill. But it was a secondary affair. And events proved that there was no sufficiency in it. When Von Spee's squadron vanished beneath the seas Germany applied her mind to the matter and perceived at length the true nature of the issue. Successes here and there could not help her. She must somehow, heroically or otherwise, cut the Gordian knot or reckon with defeat. Thus it was that the rôles were reversed, and while Britain unexpectedly threw her weight into military operations, Germany turned her gaze seawards and sought to pluck victory from an element not her own.
Dimly at first but with growing clearness she perceived that from the sea the Alliance daily renewed its strength, that the sea was the source of its recuperative energy, the healing well; that while the seas were open it would nourish as it were eternal youth, that the waterways were the avenues to the elixir vitae, the resources of the world which made good even the crushing wear and tear of modern war. There is no better judge among the nations of where lie the odds in material things, and with faultless judgment she put aside any temptation that may have assailed her to make the heroic venture, to engage outright the Grand Fleet. There lay the irreducible factor in the situation. "With its defeat the problem would have solved itself. But with Jutland that solution had to be abandoned, and with it the faith she had taught herself that in men and gunnery her navy was more than Britain's equal. Another way had to be chosen. Undefeated, could the Grand Fleet be circumvented? Could it somehow be eliminated from the calculation, could a blow be dealt at the communications of the Alliance from which battleships were powerless to shield it? In evasion and circumvention, she judged, lay the key to the unforceable lock. With the immense self-confidence that marks these serfs of theory, the Germans drew their plan—a ruthless campaign conducted with the same pitiless logic, the same patience and forethought that they were accustomed to devote to their military operations. Eluding the armed adversary, with all their great and remaining strength they would strike at the unarmed,—
"God's mercy, then, on little ships
Who cannot fight for life."
Were it possible, and Germany believed it possible, to sever Britain's sea arteries, the hated enemy might bleed to death, slowly perhaps but surely. She perceived the joint in the harness and drove in the knife. Intimidation was here to play its usual part. If horror accompanied terror so much the better, the world must learn what it was to oppose an angry and implacable Germany. Then, and not till then, Britain realised the strength and weakness of her position; perceived at last and with many searchings of heart her vulnerability, and with growing pride the peculiar genius of her race. So the sea affair finally reduced itself into an attack upon the Allies' communications, that is an attack upon Britain's Merchant Marine, accompanied, since no less would suffice, with crime of the first magnitude. Casting about for weapons to be used against a foe unchallengeable in a direct encounter Germany found three to her hand—the disguised raider, the mine and the submarine, all be it observed prowling or furtive weapons, with whose stealthy assistance Germany proposes to usher in the Golden Age. With this new and triple-headed engine Britain was to be bludgeoned into submission. You desire to make allowances for Germany's difficulties, and they were many. Waive then the inherent defect of these engines, that two of them cannot be employed with humanity. Argue if you like that in the interests of your own people, the general interests of the race must be sacrificed; that war is war, and that chivalrous war is a Christian absurdity. The Dark Ages would no doubt have described the use of the new weapons as savagery. In our enlightened times harsh phrases are inadmissible. There appears therefore to be need of some gently uncomplaining word to describe the indiscriminate slaughter of non-combatants, of humanitarian helpers on relief ships, of crippled wounded aboard hospital ships. Her errand of mercy did not save the Norwegian steamer Storsted, known to be carrying a cargo of maize for the relief of starving Belgians.
Finally you come to Germany's dealing with neutrals. The world has dreamt many evil dreams, but this is a nightmare. You are at peace with a neighbouring nation. You find it necessary nevertheless to destroy its property. Wonderful! You are in fact on the friendliest terms with her people, to whom you owe many of your essential supplies, but you kill them without hesitation and without mercy—Still more wonderful! If they complain you become virtuously indignant and threaten worse things. It is past whooping! Already over 800 neutral ships, all of course unarmed, have been done to death. These are indeed martial achievements. Judge of the whole by a part of the most dolorous history in the records of civilisation. "Norway," said the National Tidende in April 1917, "has lost since the beginning of the war one-third of her mercantile marine, and about 300 of her sailors, and is now losing 5 lives daily and an average of two ships, valued at two million kroner." Denmark has lost 150 ships, and more than 200 of her sailors have been killed. Do not mistake. It is all pure friendliness. As Hamlet says, "They but poison in jest." "Thirteen survivors of the crew of the Norwegian ship Medusa, 1023 tons, have been landed," runs the record of May 22, 1917, "their vessel having been shelled and sunk by a German submarine. Seven of the thirteen were hospital cases. The Germans in addition to not giving them any warning, continued shelling the crew while they were lowering the boats. The bursting of the shells scattered shrapnel which killed two men and severely wounded seven others. One man had half his left foot blown away, and another some of his scalp blown off, while a third had his neck lacerated."
Let us not imagine however that Germans are themselves in agreement with respect to this warfare. Professor Flamm of Charlottenburg is dissatisfied. In Die Woche he advocates sterner dealing. Fewer men of the crews of torpedoed vessels should be saved. Best of all would it be if destroyed neutral ships disappeared without leaving a trace even of wreckage. Then terror would strike at men's hearts. How charming a friend is Professor Flamm. For it is not enemies he desires to treat thus. It is not war he advocates, only an exposition of the German mind. Norway, Denmark and the rest are enjoying the pleasures of peace. Perhaps learning will supply us with a new name for these operations. Had Germany begun the war with justice on her side her conduct of it would long since have driven justice, a fugitive, to the opposite camp. Into the teeth of this hurricane of hate the merchant seamen put forth, and every hour that we watch it from sheltered homes is taking toll of their lives. Read the long list of officers in the service that are gone, and remember that beyond it lies a longer and more sorrowful category still of men that held no rank nor ever thought of fame; engineers and deck hands, boys and stokers, so that in the fishing villages from North to South the tiniest mourns its unreturning dead.
Of the raiders, so far as it has been written, we know the record. The sea is wide, and one might almost as well look for an escaped bird in the forest as for a single ship in any ocean. They have had their victims; fifty of our merchantmen were seized or sunk before the first phase ended with the battle of the Falklands and the destruction of Von Spee. There were of course escapes and adventures, like that of the Pacific Steam Navigation cargo vessel and her conversation with the Karlsruhe, which had information of her position and sent out a wireless signal asking for the latitude and longitude. The operator, instructed by the captain, sceptical soul, refused the friendly suggestion. The polite enemy retorted, "English schweinhund. This is German warship, Karlsruhe, we will you find." But the night set in thick with misty rain, and though only a few miles distant the English ship, heedless of angry signals, slipped away and escaped. The subsequent disguised commerce raiders could only creep at long intervals and under colours not their own, through the patrols, in rain or snow storms, by circuitous routes and through territorial waters. Meteor, under the Russian flag, was rounded up deserted and destroyed by her own crew. Berlin driven into Trondhjem and interned. Greif disguised as a Norwegian ship perished in the encounter with Alcantara. Of these ventures, one may say, that they repeated tactics familiar in all our wars; tactics which never yet turned the scale or threatened to turn it. Consider now the far more serious menace of the submarine and mine. These were weapons indeed not altogether novel, the novelty lay in the scale and ruthless manner of their employment; and the ruthless policy once launched, three things, at first but dimly distinguishable amid the confusion of so vast a conflict, took shape and form. First that the war, however long the decision might be postponed, had entered upon its final and decisive stage. Second that the full strength and pressure of the attack would now be transferred from the Royal Navy to the Mercantile Marine; and third that upon its tenacity and powers of endurance depended not the destiny of Britain alone but that of the world. It was to be a conflict grim and great, suited to the stupendous consequences which hung upon the issue, a conflict without the dramatic and inspiring incidents of engagements between embattled fleets, of monotonous almost featureless repetitions of the same gruesome story, in which the enemy trusted to the accumulated effect of a blow dealt again and again, and yet again, in hardly varying circumstances, reducing with each successful effort the maritime resources upon which the fortunes of the Alliance were absolutely staked. Britain's capital—who is now unaware of it?—is her shipping, and the drain upon that capital, the ceaseless call upon this bank of national security could not fail if unarrested to compass her ruin. Britain, and with Britain her allies, would succumb to a series of stabs in the back.
How is one to account for the success of the submarine campaign? The answer is that Britain was not prepared for it. Why was she not prepared? For no other reason than that it was unthinkable. It is as if a respectable curate of your acquaintance were to whip out a revolver and demand your purse. You are taken by surprise for you had not thought these things possible in your neighbourhood, and particularly not to be expected from a clergyman. The world did not anticipate the new code of morals, more especially from a people of culture. It simplifies the business of the highwayman if you have believed him to be an evangelist. Deceived by the spectacles and the missionary manner Britain left her merchant ships unarmed, and was quite unprovided with mines or any other defensive machinery for her traders. By the law and custom of the nations merchant vessels must not be destroyed at sea but brought into port, and become prizes of war only if condemned after a judicial enquiry. From the first these provisions of international law were thrown aside by Germany. That they had existed, that civilisation had trusted and that she herself had endorsed them gave her a magnificent advantage. She took advantage—the most hideous form of depravity—of the world's growth in goodness. It was felt however that something might be pardoned to an enemy in sore straits, and even Britain made no angry complaint. Having discarded civilised usage as regards property and discarded it in vain the temptation assailed her to descend another step and disregard considerations of humanity. At first, as one knows, the crews and passengers of torpedoed ships were given a chance to escape death. Then, reaching the lowest rung of the malevolent ladder, Germany bowed farewell to her last scruple. Facilis descensus Averni. Free yourself from restraint, lay aside obligations moral and legal, and for the destruction of commerce you have in the submarine a weapon without equal, an immoral inspiration. Unaware that the world, had outgrown morals, that chivalry was wholly out of date, Britain taken aback had, it may be confessed, no ready or immediate answer, and it seemed indeed as if the new instrument possessed qualities unanswerable, borrowed from the region of fable. Only in fables does one put on at will the mantle of invisibility or don invulnerable armour. To see without being seen; to cover yourself with a garment upon which blows fall in vain—these powers suggest magic or dealings with the infernal world. How is an enemy to be resisted who can attack unexpectedly and, if threatened, vanish like a dream? Each of our merchant vessels, it has been said is like an unarmed man walking down a dark lane infested with armed highwaymen. Carrying 30 or 40 of a crew, armed with a gun for surface fighting, and that terrible and devastating weapon, the torpedo, for the secret offensive, capable of an underwater speed—8-10 knots—equal to, and a surface speed of 18 to 20 knots—far in excess of the average trader; with a radius of action extending to three or four thousand miles, and the capacity of remaining at sea for months at a time, one need feel no surprise that the world rings with the performances of this submersible cruiser. The torpedo is in itself a mechanism of uncanny quality; nothing else than a small vessel, costing £1,000 to build, it moves with a speed of 40 knots, is propelled by its own engines and directed by its own steering gear. Effective at any range under 10,000 yards, given position at the range of a couple of miles it may easily kill; at a mile it kills infallibly. Supply your merchantmen with guns and you drive the submarine to shelter, but you do not disarm it, and though it must manœuvre for position to discharge a successful torpedo, if the missile take effect, a single shot usually suffices. The German submarine hates the gun behind which stands a British crew, and prefers the warfare in which blow cannot be returned for blow. No Briton dislikes a fair fight, or doubts of his success in it, but a warfare in which he can neither see nor retaliate upon the foe, in which his hands are tied, strikes his simple and uncultured mind as cowardly. There is nothing for it but to run away, and for running away Britons are by nature little adapted.
Of the capital expended by Germany on this campaign 15 or 20 millions at least already lie in the ocean depths; but side by side with these millions lies the uncounted wealth of the slaughtered ships and cargoes. Only when we perceive the true character of the weapon and the value of the campaign can the endurance and achievements of the merchant sailor emerge for us into the full sunshine of their splendour. Examine the matter coolly and one sees that the submarine owes its success as much to its novelty as to its inherent capacities. The limitations and defects are as obvious as the qualities. Virtually powerless on the surface against armed vessels of high speed like destroyers, completely submerged it has hearing indeed but not sight. It can obtain little or no knowledge of the drift of current and tide and is blind to surrounding dangers. Above water it can be rammed or shelled, below it can be netted or mined. Strange things have happened to it at the hands of ingenious skippers. Anchors have rudely disturbed its repose when nestling in the sand, and an enterprising seaman has been known to leap aboard a rising vessel, lay about him with a hammer, smash the periscope tube and deprive the aggrieved monster, like another Polyphemus, of his single eye. Against observation or attack from the air, too, the submarine is wholly without defence. It is incapable of descending to great depths and rarely dives lower than 50 feet. The dirigible or hydroplane poised above it is master of the situation, can discover its presence at a great depth, and with ease and perfect security destroy it, either when it emerges or even by means of explosives below the surface.