Therefore I decided that our forces should become, for the purpose of this war, virtually a part of the Allied navies; to place at the disposal of the Allies our ships to reinforce the weak part of their lines; to ignore such secondary considerations as national pride, naval prestige, and personal ambitions; and to subordinate every other consideration to that of defeating the Hun. I have already described how in distributing our subchasers I practically placed them at the disposal of the Allied Council; and this represents the policy that was followed in all similar matters. The naval high commands were located at Washington, London, Paris, and Rome. Necessarily London was the headquarters of the naval war. Events which had long preceded the European conflict had made this choice inevitable. The maritime development of four centuries had prepared London for the rôle which she was now called upon to play. From all over the world naval and maritime information flowed to this great capital as though in obedience to the law of gravity. Even in peace times London knew where every ship in the world was at any particular time. All other machinery for handling this great mass of detail was necessarily accumulated in this great city, and Lloyd's, the world headquarters for merchant shipping, had now become practically a part of the British Admiralty. In this war the matter of information and communications was supremely important. Every decision that was made and every order that was issued, even those that were the least consequential, rested upon complete information which was obtainable, in time to be useful, only in London. I could not have made my headquarters in Washington, or Paris, or Rome because these cities could not have furnished the military intelligence which was needed as a preliminary to every act. For the same reason I could not have efficiently controlled the operations of all our forces from Queenstown, or Brest, or Gibraltar; the staff controlling the whole had necessarily to be located in London, and the tactical commands at these other bases must be exercised by subordinates. The British placed all their sources of information and their communications at our disposal. They literally opened their doors and made us part of their organization. I sat daily in consultation with British naval chiefs, and our officers had access to all essential British information just as freely as did the British naval officers themselves. On the day of my arrival Admiral Jellicoe issued orders that the Americans should be shown anything which they wished to see. With all this information, the most complete and detailed in the world, constantly placed at our disposal, and a spirit of confidence and friendship always prevailing which has no parallel in history, it would have defeated the whole purpose of our participation in the war had the American high command taken up its headquarters anywhere except in London.