It has for a century been the rational practice of the German Government that its chief strategist should at all times keep ready designs for operations in case of war against any reasonably possible adversary. Such a set of designs would naturally include a plan of operation for the case of a conflict with Great Britain, and no doubt, every time that plan of operations was re-examined and revised, light would be thrown upon the difficulties of a struggle with a great maritime Power and upon the means by which those difficulties might be overcome. The British navy is so strong that, unless it were mismanaged, the German navy ought to have no chance of overcoming it. Yet Germany cannot but be anxious, in case of war, to protect herself against the consequences of maritime blockade, and of the effort of a superior British navy to close the sea to German merchantmen. Accordingly, the law which regulates the naval shipbuilding of the German Empire lays down in its preamble that—“Germany must possess a battle-fleet so strong that a war with her would, even for the greatest naval Power, be accompanied with such dangers as would render that Power’s position doubtful.” In other words, a war with Great Britain must find the German navy too strong for the British navy to be able to confine it to its harbours, and to maintain, in spite of it, complete command of the seas which border the German coast. As German strategists continuously accept the doctrine that the first object of a fleet in war is the destruction of the enemy’s fleet with a view to the consequent command of the sea, the German Navy Act is equivalent to the declaration of an intention in case of conflict to challenge the British navy for the mastery. This is the answer to the question asked at the beginning of the last chapter, whether the command of the sea is a permanent prize or a challenge cup. Germany at any rate regards it as a challenge cup, and has resolved to be qualified, if occasion should arise, to make trial of her capacity to win it.