The last-named course was determined upon. On February 3, 1917, President Wilson addressed the two Houses of Congress in joint session, informing them that the United States had severed its relations with Germany. The President reviewed the circumstances which led to the giving of the German undertaking to the United States following the sinking of the _Sussex_ on March 24, 1916, without warning. He reminded Congress that on the April 18 following the Administration informed the German Government that unless it "should now immediately declare and effect an abandonment of its present methods of submarine warfare against passenger and freight-carrying vessels, the Government of the United States can have no choice but to sever diplomatic relations with the German Empire altogether." The German Government consented to do so with reservations. These the United States brushed aside, and committed Germany to the plain pledge that no ships should be sunk without warning unless they attempted to escape or offered resistance. In view of Germany's new declaration deliberately withdrawing her solemn assurance without prior intimation, the President told Congress that the Government had no alternative consistent with the dignity and honor of the United States but to hand Count von Bernstorff, the German Ambassador, his passports, and to recall Ambassador Gerard from Berlin. But the President refused to believe that the German authorities intended to carry out the decree. "I cannot bring myself to believe," he said, "that they will indeed pay no regard to the ancient friendship between their people and our own or to the solemn obligations which have been exchanged between them and destroy American ships and take the lives of American citizens in the willful prosecution of the ruthless naval program they have announced their intention to adopt. Only actual overt acts on their part can make me believe it even now." But in the event of such overt acts the duty of the United States was clear: "If this inveterate confidence on my part in the sobriety and prudent foresight of their purpose should unhappily prove unfounded, if American ships and American lives should in fact be sacrificed by their naval commanders in a heedless contravention of the just and reasonable understanding of international law and the obvious dictates of humanity, I shall take the liberty of coming again before the Congress to ask that authority be given me to use any means that may be necessary for the protection of our seamen and our people in the prosecution of their peaceful and legitimate errands on the high seas. I can do nothing less. I take it for granted that all neutral governments will take the same course." Should Germany compel the United States to declare war, the President repudiated that any aggressive attitude would dictate such a course: