The confusion of the two ideas leads to much unnecessary wrangling as to the proper sphere of army and navy in coast-defence. Passive defences belong to the army; everything that moves in the water to the navy, which has the prerogative of the offensive defence. If seamen are used to garrison forts, they become part of the land forces, as surely as troops, when embarked as part of the complement, become part of the sea forces. CHAPTER II. STATE OF EUROPE IN 1660.--SECOND ANGLO-DUTCH WAR, 1665-1667. SEA BATTLES OF LOWESTOFT AND OF THE FOUR DAYS. The period at which our historical survey is to begin has been loosely stated as the middle of the seventeenth century. The year 1660 will now be taken as the definite date at which to open. In May of that year Charles II. was restored to the English throne amid the general rejoicing of the people. In March of the following year, upon the death of Cardinal Mazarin, Louis XIV. assembled his ministers and said to them: "I have summoned you to tell you that it has pleased me hitherto to permit my affairs to be governed by the late cardinal; I shall in future be my own prime minister. I direct that no decree be sealed except by my orders, and I order the secretaries of State and the superintendent of the finances to sign nothing without my command." The personal government thus assumed was maintained, in fact as well as in name, for over half a century. Within one twelvemonth then are seen, setting forward upon a new stage of national life, after a period of confusion more or less prolonged, the two States which, amid whatever inequalities, have had the first places in the sea history of modern Europe and America, indeed, of the world at large. Sea history, however, is but one factor in that general advance and decay of nations which is called their history; and if sight be lost of the other factors to which it is so closely related, a distorted view, either exaggerated or the reverse, of its importance will be formed. It is with the belief that that importance is vastly underrated, if not practically lost sight of, by people unconnected with the sea, and particularly by the people of the United States in our own day, that this study has been undertaken.