But this oil scarcity made it impossible to move the Atlantic Fleet into European waters, at least at that time. Since most oil supplies were brought from America, we simply could not have fuelled our super-dreadnoughts in Europe in the spring and summer of 1917. Moreover, if we had sent all our big ships to England we should have been obliged to keep our destroyers constantly stationed with them ready for a great sea action; and this would have completely fallen in with German plans, for then these destroyers could not have been used against her submarines. The British did indeed request that we send five coal-burning ships to reinforce her fleet and give her that preponderance which made its ascendancy absolutely secure, and these ships were subsequently sent; but England could not have made provision for our greatest dreadnoughts, the oil burners. Indeed our big ships were of much greater service to the Allied cause stationed on this side than they would have been if they had been located at a European base. They were providing a reserve for the British fleet, precisely as our armies in France were providing a reserve for the Allied armies; and meanwhile this disposition made it possible for us to send their destroyer escorts to the submarine zone, where they could participate in the anti-submarine campaign. In American waters these big ships could be kept in prime condition, for here they had an open, free sea for training, and here they could also be used to train the thousands of new men who were needed for the new ships constructed during the war.