[11] La Serre: Essais Hist. et Crit. sur la Marine Française.
[12] Lapeyrouse-Bonfils: Hist. de la Marine Française.
[13] Jurien de la Gravière: Guerres Maritimes.
[14] Since the above was written, the secretary of the navy, in his report for 1889, has recommended a fleet which would make such a blockade as here suggested very hazardous.
[15] The word "defence" in war involves two ideas, which for the sake of precision in thought should be kept separated in the mind. There is defence pure and simple, which strengthens itself and awaits attack. This may be called passive defence. On the other hand, there is a view of defence which asserts that safety for one's self, the real object of defensive preparation, is best secured by attacking the enemy. In the matter of sea-coast defence, the former method is exemplified by stationary fortifications, submarine mines, and generally all immobile works destined simply to stop an enemy if he tries to enter. The second method comprises all those means and weapons which do not wait for attack, but go to meet the enemy's fleet, whether it be but for a few miles, or whether to his own shores. Such a defence may seem to be really offensive war, but it is not; it becomes offensive only when its object of attack is changed from the enemy's fleet to the enemy's country. England defended her own coasts and colonies by stationing her fleets off the French ports, to fight the French fleet if it came out. The United States in the Civil War stationed her fleets off the Southern ports, not because she feared for her own, but to break down the Confederacy by isolation from the rest of the world, and ultimately by attacking the ports. The methods were the same; but the purpose in one case was defensive, in the other offensive.
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.