This question we must try to answer. But before entering upon that inquiry I will ask the reader to note the great lesson of the age of Napoleon and of Nelson. It produced a change in the character of war, which enlarged itself from a mere dispute between Governments and became a struggle between nations. The instrument used was no longer a small standing army, but the able-bodied male population in arms. Great Britain indeed still retained her standing army, but for the time she threw her resources without stint into her navy and its success was decisive. VI. THE BALANCE OF POWER We have seen what a splendid prize was the result of British victory at sea, supplemented by British assistance to other Powers on land, a century ago. We have now to ask ourselves first of all how it came about that Great Britain was able to win it, and afterwards whether it was awarded once for all or was merely a challenge cup to be held only so long as there should be no competitor. The answer to the first question is a matter of history. England was peculiarly favoured by fortune or by fate in the great struggles through which, during a period of three hundred years, she asserted and increased her superiority at sea until a century ago it became supremacy. She rarely had to fight alone. Her first adversary was Spain. In the conflict with Spain she had the assistance of the Dutch Provinces. When the Dutch were strong enough to become her maritime rivals she had for a time the co-operation of France. Then came a long period during which France was her antagonist. At the beginning of this epoch William III. accepted the British crown in order to be able to use the strength of England to defend his native country, Holland. His work was taken up by Marlborough, whose first great victory was won in co-operation with the Imperial commander, Prince Eugene. From that time on, each of the principal wars was a European war in which France was fighting both by sea and land, her armies being engaged against continental foes, while Great Britain could devote her energies almost exclusively to her navy. In the Seven Years' War it was the Prussian army which won the victories on land, while small British forces were enabled by the help of the navy to win an Empire from France in Canada, and to lay the foundations of the British Empire in India. In the war of American Independence, Great Britain for once stood alone, but this was the one conflict which contributed little or nothing towards establishing the ascendency of the British navy. Great Britain failed of her object because that ascendency was incomplete. Then came the wars of the French Revolution and Empire in which the British navy was the partner of the Austrian, Prussian, Russian, and Spanish armies.