States into the war before it drove Great Britain out. As late as 22 January, President Wilson, while depicting the sort of peace which would commend itself to the American people, disavowed any intention of helping to secure it by force of arms. But on the 31st Germany revoked her promise given on 4 May 1916 that vessels other than warships would not be sunk without warning, and announced her resolve forthwith to wage submarine war without any restriction. Later on Herr Bethmann-Hollweg stated that the promise had only been given because Germany's preparations were incomplete, and was revoked as soon as they were ready. The President's answer was prompt: on 3 February the German ambassador was given his passports and Mr. Gerard was recalled from Berlin. But the invitation to other neutrals to follow the President's lead was declined on this side of the Atlantic. Switzerland, without any seaboard, was not concerned with submarine warfare, and other neutrals were too much under the influence of German blandishments or terror to risk war in defence of their rights; they preferred to abandon their sailings to British ports. At first the President contemplated no more than an armed neutrality, and proposed to equip all American mercantile vessels for self-defence. But the sinking of American ships and loss of American lives began to rouse popular anger; sailings stopped at the ports, the railways became congested with goods seeking outlet, and the remotest inland districts felt the effects of the German campaign. In March, too, the Russian revolution removed a stumbling-block to co-operation with the Entente, for American public opinion had always been sensitive to the iniquity of the old regime in Russia. At length the President summoned a special session of Congress, and on 2 April recommended a declaration of war. It was adopted in the Senate on the 4th by 82 votes to 6, and by the House of Representatives on the 5th by 373 to 50. Of the ultimate issue of the war there could now be no doubt. Time would be needed for the United States to mobilize its resources and train its armies, and the extent to which they might be required would depend upon the course of events in Europe. But the Americans were not a people to turn back having put their hand to the plough, and with their forces fully deployed they would alone be more than a match for the German Empire. Victory might be delayed, but its advent was assured, and the first fortnight of April saw the hopes of the Allies rise higher than since the war began. CHAPTER XV HOPE DEFERRED