The Germans, who as a people fall easy victims to agreeable sentiment, indulged extravagant hopes from war in the air, and expected great achievements from their Zeppelins. On the other hand, the English, who are less excitable, were comparatively slow as a nation to appreciate the importance of the new invention. Conservative and humorous minds are always conscious chiefly of the immutable and stable elements in human life, and do not readily pay respect to novelty. Those who were responsible for the naval and military defences of the country preserved great coolness, and refused to let judgement outrun experience. They knew well that the addition to man's resources of yet another mode of travel or transport does not alter the enduring principles of strategy. They regarded the experiment benevolently, and, after a time, were willing to encourage it, but 'up to the end of the year 1911', says an official report, 'the policy of the Government with regard to all branches of aerial navigation was based on a desire to keep in touch with the movement rather than to hasten its development. It was felt that we stood to gain nothing by forcing a means of warfare which tended to reduce the value of our insular position and the protection of our sea-power.' When the Wright brothers offered to sell their invention to the British Admiralty, the offer was refused.

It is natural enough that believers in the new art, who devoted years of disinterested thought and labour to getting it recognized, and who truly foresaw its enormous importance, should be impatient of so cautious an attitude. But the attitude itself was also natural and excusable. The British navy is a great trust, responsible not so much for the progress of the nation as for its very existence. Untried courses, new investments, brilliant chances, do not commend themselves to trustees. By adherence to a tried policy and to accustomed weapons the navy had ridden out many a storm that threatened national wreckage; what it had done so often it believed that it could do again; and it was slow to grasp at new weapons before their value was proved. So the progress of aerial science followed what, in this country, is the normal course. We have had many great poets and many great inventors. We sometimes starve our poets, but we make classics of their works. We sometimes leave our inventors to struggle unaided with difficulties, but when they succeed we adopt their inventions as part of the national inheritance, and pay to their names a respect greater than bounty-fed dependence can ever command or deserve. Their failures are their own, their successes belong to their country; and if success brings them no other reward, they can at least claim a part in the honour universally paid to soldiers and sailors, whose profession is sacrifice.

As soon as it became clear that no nation could without extreme peril to itself neglect the new weapon, the Government took up the problem in earnest. Private enterprise might, no doubt, have been trusted to improve and develop aircraft for the various uses of peace, but the question was a question of war. The purposes and ambitions of the German Empire had again and again been freely expressed, in no moderate language, and the German menace lay like a long vague shadow across the peace of Europe. Peaceful citizens, with many other things to think of, might fail to see it, but no such blindness was possible for those who had charge of the defences of the country. The Committee of Imperial Defence, in the few years before the war, took expert advice. The Government, acting on this advice, furnished us with the nucleus of an air force. They made their own flying school, and established their own factory for the output of aircraft. They organized an air service with naval and military wings. They formed advisory and consultative committees to grapple with the difficulties of organization and construction. They investigated the comparative merits and drawbacks of airships and aeroplanes. The airships, because they seemed fitter for reconnaissance over the sea, were eventually assigned wholly to the Naval Wing. No very swift progress was made with these in the years before the war. The expenses of adequate experiment were enormous, and the long tale of mishaps to Zeppelins seemed to show that the risks were great. The experts who were consulted pointed out that the only way to test the value of the larger type of airship was to build such airships ourselves, that Germany had patiently persevered in her airship policy in the face of disaster and loss, and that if we were to succeed with airships it would be necessary to warn the public that heavy losses, in the initial stage, were unavoidable. Opinion in this island, it is right to remember, was strong against the airship, or gas-bag, and Germany's enthusiastic championship of the Zeppelin made the aeroplane more popular in England. So our airship policy was tentative and experimental; a few small airships were in use, but none of the large size and wide range required for effective naval reconnaissance. Good and rapid progress, on the other hand, was made with aeroplanes and seaplanes, and when war broke out we had a small but healthy service, both naval and military, ready to take the air.

Four squadrons of the Military Wing, or Royal Flying Corps, that is to say, forty-eight machines, with a few additional machines in reserve, bore a part in the retreat from Mons. A detachment of the Naval Wing, or Royal Naval Air Service, was sent to Belgium, and after bearing a part in the defence of Antwerp, established itself at Dunkirk, which remained throughout the war a centre for aerial operations. These were the beginnings; in the four years and three months of the war the air service grew and multiplied a hundredfold. At the date of the armistice, the 11th of November 1918, there were operating in France and Belgium ninety-nine squadrons of the Royal Air Force. In August 1914 there had been less than two hundred and fifty officers in the service, all told; in November 1918 there were over thirty thousand. In August 1914 the total of machines, available for immediate war service, was about a hundred and fifty; in November 1918 there were more than twenty-two thousand in use, almost all of them enormously more powerful and efficient than the best machines of the earlier date. In the course of the war our air forces accounted for more than eight thousand enemy machines; dropped more than eight thousand tons of bombs on enemy objectives; fired more than twelve million rounds of ammunition at targets on the ground; took more than half a million photographs; brought down nearly three hundred enemy balloons; and suffered a total of casualties not far short of eighteen thousand. Not less important in its influence on the fortunes of the war than any of these achievements, perhaps more important than all of them, was the work done by aircraft in detecting movements of the enemy and in directing the fire of our gunners upon hostile batteries. This work cannot be exactly assessed or tabulated, but the German gunner knew where to look for the enemy he most dreaded.

A rapid summary of this kind shows that the history of the war in the air is inseparable from the history of the development of the art of flying. Of those who were competent to handle a machine in the air during the years before the war by far the greater number served with the colours. With the outbreak of war civilian flying, except for training purposes, abruptly ceased. The necessities of war compelled and quickened invention. When a nation is fighting for its life, money and energy are expended without check, and it may be doubted whether in the whole history of mankind any art in its infant stage has been so magnificently supported and advanced by war as the art of flying was supported and advanced by the greatest war of all.

No history can be expected to furnish a full record of all the acts of prowess that were performed in the air during the long course of the war. Many of the best of them can never be known; the Victoria Cross has surely been earned, over and over again, by pilots and observers who went east, and lie in unvisited graves. The public dearly loves a hero; but the men who have been both heroic and lucky must share their honours, as they are the first to insist, with others whose courage was not less, though their luck failed them. There is a quaint system, in use in the air service, of reckoning the activities of the service in terms of hours flown, taking as the unit for addition every single hour flown by each individual machine. By this method of calculation, the hours flown by the air service, on all fronts, during the war can be shown to be much over a million. The work of an ant-hill, reckoned on the same basis, would present a stupendous total. If the heroism of the air service, that is to say, their deeds of surpassing courage and devotion, could be thus computed, the figure would run into thousands; and this would be the fairest, though not the most dramatic, statement of the case. The officers in command have always been unwilling to pay regard to 'star turns'; what they have coveted for the service is not a low range of achievement rising now and again into sharp fantastic peaks, but a high tableland of duty and efficiency. They obtained their desire, in a result more surprising than any single exploit can ever be. They made courage and devotion the rule, not the exception. The work of the air service on a war front consists of often-repeated short periods of intense strain. One pilot described it well by saying that it is like going to the dentist every day. To exact the highest standard of conduct under this strain, not as an ideal to be aimed at, but as a working rule, might well seem to be winding up human nature to a point where it must break. The commanders of the air service did not hesitate to take the risk. They trusted human nature, and were amply rewarded. The experiences of the war revealed, to a generation that had almost forgotten them, the ancient and majestic powers of man, the power of his mind over his body, the power of his duty over his mind. When the builders have been praised for their faith and for their skill, the last word of wonder and reverence must be kept for the splendid grain of the stuff that was given them to use in the architecture of their success.

Those matters are fittest for history which exhibit a process of growth. The great periods of human history are not the long periods; they are those times of change and crisis when the movements of humanity are quickened and made visible, when the stationary habits and conservative traditions of mankind are broken up, and one phase of civilization gives place to another, as the bud, long and slowly matured, suddenly bursts into flower. The story of the war in the air is a perfect example of this quickening process, whereby developments long secretly prepared, and delayed until hope is saddened, are mysteriously touched with life, and exhibit the tendencies of ages condensed in the events of a few crowded years. The flying machine, which at the end of the nineteenth century was a toy, ten years later was added to the most valuable resources of man, and ten years later again bid fair to alter the conditions of his life on the surface of the earth. The war, though it did not cause this great change, accelerated it enormously. War is exacting, and it is difficult to think of any peaceful uses of aircraft which do not find their counterpart in naval and military operations. When General Townshend was besieged in Kut, there came to him by aeroplane not only food (in quantities sadly insufficient for his needs), but salt, saccharine, opium, drugs and surgical dressings, mails, spare parts for wireless plant, money, and a millstone weighing seventy pounds, which was dropped by means of a parachute. In the actual operations of the war the uses of aircraft, and especially of the aeroplane, were very rapidly extended and multiplied. The earliest and most obvious use was reconnaissance. To the Commander-in-Chief a detailed knowledge of the enemy's dispositions and movements is worth more than an additional army corps; aeroplanes and balloons furnished him with eyes in the air. As observation was the first purpose of aircraft, so it remains the most important. During the war it was developed in many directions. The corps machines operating on the western front devoted themselves among other things to detecting enemy batteries and to directing the fire of our own artillery. As soon as a wireless installation for aeroplanes came into use, and the observer was thus brought into close touch with his own gunners, this kind of observation became deadly in its efficiency, and was the chief agent in defeating the German scheme of victory by gun-power. When once a hostile battery was located, and our guns, by the aid of observation from the air, were ranged upon it, the fire of that battery was quickly silenced. Other branches of observation, developed during the war, were photography from the air and contact patrol. Complete photographic maps of Hun-land, as the territory lying immediately behind the enemy lines was everywhere called, were made from a mosaic of photographs, and were continually renewed. No changes, however slight, in the surface of the soil could escape the record of the camera when read by the aid of a magnifying glass. Contact patrol, or reports by low-flying aeroplanes on the exact position of the advancing infantry, came later, and supplemented the use of the telephone, which was liable to be destroyed by shell-fire. Our contact patrols saved us from a world of those most distressing of casualties, the losses inflicted on troops by their own guns.

Serious battle in the air, which was engaged on no large scale until the second year of the war, was, in its essence, an attempt to put out the eyes of the other side. In the early days officers often took a revolver, a carbine, or a rifle, into the air with them, but machines designed expressly for fighting, and armed with Lewis or Vickers guns, did not appear in force until it became necessary to counter the attacks made by the Fokker on our observation machines. Then began that long series of dramatic combats, splendid in many of its episodes, which fascinated the attention of the public, and almost excluded from notice the humbler, but not less essential, and not less dangerous, duties of those whose main business it was to observe.

Lastly, the offensive powers of aircraft have been so rapidly developed, especially during the latest period of the war, that it was only the coming of the armistice that saved mankind from a hurricane of slaughter. In 1914 a few small bombs were carried by officers into the air, and were gingerly dropped over the side of the machine. Accuracy of aim was impossible. In the large modern bombing machine the heavier bombs weigh almost three-quarters of a ton; they are mechanically released from the rack on which they are hung, and when the machine is flying level, at a known pace and height, good practice can be made, by the aid of an adjustable instrument, on any target. Even more desolating in its effect is the work done by low-flying aeroplanes, armed with machine-guns, against enemy troops on the march. Raids on the enemy communications, for the destruction of supplies and the cutting off of reinforcements, played a great part in the later phases of the war; and long-distance raids over enemy centres served to bring the civil population into sympathy with the sufferings of the army.

All these activities belong to war on the land, and the aeroplanes of the Royal Naval Air Service bore a part in them. Members of the naval squadrons at Antwerp carried out the earliest bombing raids into Germany. The kite balloons, which rose like a palisade behind our lines and kept the enemy under observation, were, in the early time of the war, supplied by the navy. Moreover, the navy had work of its own to do in the air. The business of coast defence and patrol, the convoy of vessels—in short, all the office-work that would fall to an Inspector-General of the Seven Seas had to be done by the navy. The seaplane and the flying boat can come to rest on the surface of the sea, but it is no secret that they are not always comfortable there, and there were attached to the Naval Air Service certain special vessels, constructed or adapted to be seaplane-carriers. The credit of defeating Germany's submarine campaign belongs, in part at least, to the air service, working in co-operation with the destroyers and a swarm of smaller craft. In favourable weather submarines below the surface of the water can sometimes be seen from the air, and the depth-charge, another invention of the war, dropped by surface craft, is the means of their destruction.