The game of strategy, while resembling in many ways the game of chess, differs from it, of course, in the obvious element of personal danger. It also differs from it in an equally important but less obvious way--its relation to the instruments employed; for in chess those instruments (pieces) are of a number and character fixed by the rules of the game; whereas in strategy the number and character of the instruments (ships, etc.) employed are determined by strategy itself, assisted by engineering. Germany realizes this, and therefore has established and followed a system whereby the character of the various material and personnel units of the navy, and even the number of them (under the restrictions of the money alloted), are decided by a body of men who are highly trained in strategy and engineering. There is an intimate connection between policy and strategy, and therefore between naval policy and naval strategy; and while it is difficult to draw the line exactly which separates policy and strategy, it may be said in general that policy is the concern of the government, and strategy is the concern of the navy and army, to be employed by them to carry out the policy. As naval policy and naval strategy are so intimately connected in their essence, it is apparent that the naval policy of a country and its naval strategy should be intimately connected in fact; for the policy cannot be properly carried out if the strategy that tries to execute it is not good, or if the policy requires more naval force or skill than the navy can bring to bear; and the strategy cannot be good if it is called upon to execute a policy impossible to execute, or if the exact end in view of the policy is not distinctly known. Some of the greatest mistakes that have been made by governments have been made because of a lack of co-ordination between the government and its navy, so that the policy and the strategy could not work together. We see an illustration of this throughout the history of France, whose civil and naval authorities have not worked harmoniously together, whose naval strategy has apparently been opportunistic and short-sighted, and whose navy in consequence has not been so successful as the large sums of money spent upon it might lead one to expect.