His opportunity came in 1798, when in the battle of the Nile he crushed the French Mediterranean Fleet. In a letter to Lord Howe, written January 8, 1799, he described his plan in a sentence:—

"By attacking the enemy's van and centre, the wind blowing directly along their line, I was enabled to throw what force I pleased on a few ships."

We know that Nelson's method of fighting had for months before the battle been his constant preoccupation, and that he had lost no opportunity of explaining his ideas to his captains. Here are the words of Captain Berry's narrative:—

"It had been his practice during the whole of the cruise, whenever the weather and circumstances would permit, to have his captains on board the Vanguard, where he would fully develop to them his own ideas of the different and best modes of attack, and such plans as he proposed to execute upon falling in with the enemy, whatever their position or situation might be, by day or by night. There was no possible position in which they might be found that he did not take into his calculation, and for the most advantageous attack on which he had not digested and arranged the best possible disposition of the force which he commanded."

The great final victory of Trafalgar was prepared in the same way, and the various memoranda written in the period before the battle have revealed to recent investigation the unwearying care which Nelson devoted to finding out how best to concentrate his force upon that portion of the enemy's fleet which it would be most difficult for the enemy to support with the remainder.

Nelson's great merit, his personal contribution to his country's influence, lay first and foremost in his having by intellectual effort solved the tactical problem set to commanders by the conditions of the naval weapon of his day, the fleet of line-of-battle ships; and secondly, in his being possessed and inspired by the true strategical doctrine that the prime object of naval warfare is the destruction of the enemy's fleet, and therefore that the decisive point in the theatre of war is the point where the enemy's fleet can be found. It was the conviction with which he held this principle that enabled him in circumstances of the greatest difficulty to divine where to go to find the enemy's fleet; which in 1798 led him persistently up and down the Mediterranean till he had discovered the French squadron anchored at Aboukir; which in 1805 took him from the Mediterranean to the West Indies, and from the West Indies back to the Channel.

So much for Nelson's share of the work. But Nelson could neither have educated himself nor made full use of his education if the navy of his day had not been inspired with the will to fight and to conquer, with the discipline that springs from that will, and had not obtained through long experience of war the high degree of skill in seamanship and in gunnery which made it the instrument its great commander required. These conditions of the navy in turn were products of the national spirit and of the will of the Government and people of Great Britain to devote to the navy as much money, as many men, and as vigorous support as might be necessary to realise the national purpose.

The efforts of this nature made by the country were neither perfect nor complete. The Governments made mistakes, the Admiralty left much to be desired both in organisation and in personnel. But the will was there. The best proof of the national determination is to be found in the best hated of all the institutions of that time, the press-gang, a brutal and narrow-minded form of asserting the principle that a citizen's duty is to fight for his country. That the principle should take such a shape is decisive evidence no doubt that society was badly organised, and that education, intellectual and moral, was on a low level, but also, and this is the vital matter, that the nation well understood the nature of the struggle in which it was engaged and was firmly resolved not only to fight but to conquer.

The causes of the success of the French armies in the period between 1792 and 1809 were precisely analogous to those which have been analysed in the case of the British navy. The basis was the national will, expressed in the volunteers and the levy en masse. Upon this was superimposed the skill acquired by the army in several years of incessant war, and the formal cause of the victories was Napoleon's insight into the art of command. The research of recent years has revealed the origin of Napoleon's mastery of the method of directing an army. He became an officer in 1785, at the age of sixteen. In 1793, as a young captain of artillery, he directed with remarkable insight and determination the operations by which the allied fleet was driven from Toulon. In 1794 he inspired and conducted, though still a subordinate, a series of successful operations in the Maritime Alps. In 1796, as commander-in-chief of the Army of Italy, he astonished Europe by the most brilliant campaign on record. For these achievements he had prepared himself by assiduous study. As a young officer of artillery he received the best professional training then to be had in Europe, while at the same time, by wide and careful reading, he gave himself a general education. At some period before 1796, probably before 1794, he had read and thoroughly digested the remarkable treatise on the principles of mountain war which had been left in manuscript by General Bourcet, an officer who during the campaigns of half a century had assisted as Quartermaster-General a number of the best Generals of France. Napoleon's phenomenal power of concentration had enabled him to assimilate Bourcet's doctrine, which in his clear and vigorous mind took new and more perfect shape, so that from the beginning his operations are conducted on a system which may be described as that of Bourcet raised to a higher power.

The "Nelson touch" was acquired by the Admiral through years of effort to think out, to its last conclusion, a problem the nature of which had never been adequately grasped by his professional predecessors and comrades, though it seems probable that he owed to Clerk the hint which led him to the solution which he found. Napoleon was more fortunate in inheriting a strategical doctrine which he had but to appreciate to expand and to apply. The success of both men is due to the habit of mind which clings tenaciously to the subject under investigation until it is completely cleared up. Each of them became, as a result of his thinking, the embodiment of a theory or system of the employment of force, the one on sea and the other on land; and such an embodiment is absolutely necessary for a nation in pursuit of victory.