The promises in the German note were accepted per se, and the qualifications and animadversions Germany attached to them ignored. This determined upon, the intimation was made plain to Germany that should another ship be sunk in contravention of her new pledge no exchange of notes would ensue, but a severance of diplomatic relations would automatically be effected by the forbidden act. German submarine commanders held in their hands the key to the situation. Any infraction of Germany's latest word would not call for a disavowal or punishment of the commander; the United States would merely act on the presumption that Germany could not or would not control her own naval forces. Berlin would not be consulted again.
The American response to the German note was sent three days later. It was brief, and swept aside the considerable debating ground Germany had invitingly spread to inveigle the United States into discussing mediation in the war. Its principal passage ran:
"Accepting the Imperial Government's declaration of its abandonment of the policy which has so seriously menaced the good relations between the two countries, the Government of the United States will rely upon a scrupulous execution henceforth of the now altered policy of the Imperial Government, such as will remove the principal danger to an interruption of the good relations existing between the United States and Germany.
"The Government of the United States feels it necessary to state that it takes it for granted that the Imperial German Government does not intend to imply that the maintenance of its newly announced policy is in any way contingent upon the course or result of diplomatic negotiations between the Government of the United States and any other belligerent government, notwithstanding the fact that certain passages in the Imperial Government's note of the 4th instant might appear to be susceptible of that construction.
"In order, however, to avoid any possible misunderstanding, the Government of the United States notifies the Imperial Government that it cannot for a moment entertain, much less discuss, a suggestion that respect by German naval authorities for the rights of citizens of the United States upon the high seas should in any way or in the slightest degree be made contingent upon the conduct of any other government affecting the rights of neutrals and noncombatants. Responsibility in such matters is single, not joint; absolute, not relative."
Secretary Lansing, in a comment on this reply, said the German note was devoted to matters which the American Government could not discuss with the German Government. He took the ground, as the American reply indicated, that the only "questions of right" which could be discussed with the German Government were those arising out of German or American action exclusively, not out of those questions which were the subject of diplomatic exchanges between the United States and any other country.
"So long as she (Germany) lives up to this altered policy," he explained, "we can have no reason to quarrel with her on that score, though the losses resulting from the violation of American rights by German submarine commanders operating under the former policy will have to be settled.
"While our differences with Great Britain cannot form a subject of discussion with Germany, it should be stated that in our dealings with the British Government we are acting, as we are unquestionably bound to act, in view of the explicit treaty engagements with that Government. We have treaty obligations as to the manner in which matters in dispute between the two Governments are to be handled. We offered to assume mutually similar obligations with Germany, but the offer was declined."
Mr. Lansing's comment appeared to be more enlightening to German opinion than the official communication. But while the German was frankly puzzled by the American contention—holding that there was an intimate connection between England's "illegal blockade policy" and the submarine war—and wondered naïvely whether or not he was the simple victim of an American confidence game, or strongly suspected that he had been hoodwinked by President Wilson into parting with the effective submarine weapon, with no guarantee of getting any action against England in return, hard German common sense discerned through these doubts, and made the most of the one all-important fact it could comprehend—that the dreaded break had been avoided.
With the air thus cleared, the usual anticlimax came to the situation—the tumbling down of Germany's elaborate and grandiose defense of her misdeeds—by a tardy confession of error, which swept everything she had previously said into the discard. On May 8, 1916, the same day on which the American note had been dispatched, Germany sent a further communication acknowledging that, as result of further investigation, her previous contention "that the damage of the Sussex was to be traced back to a cause other than the attack of a German submarine cannot be maintained." It now seems that the Sussex had been mistaken by the submarine commander for a British transport. Nothing could be more complete than Germany's belated resort to an amende honorable after the United States had proved her guilt: