After four days of trial, hopes of success on the issue of prisoners of war seemed to fade. Adenauer`s only hope was to interrupt the negotiations and return earlier, if that impressed the Soviets, is not known. Adenauer could hardly take the risk of abandoning the negotiations and thus risking a breakdown of the East-West de-escalation policy. Apart from that, the Soviets were ready to release the prisoners of war, which they had already hinted to the SED leaders, the only question was when. For Bulganin and Khruschev, this point had already been reached at least for the following days. Finally, they were impressed by Adenauer`s firmness and principles, as well as by discussions on the causes of the war. In December 1956, Adenauer agreed with a NATO military committee on its “nuclear ambitions” that the West German armed forces should be “equipped for nuclear war.”  When Adenauer concluded that the United States would eventually withdraw from Western Europe, he followed nuclear cooperation with other countries. The French government then proposed that France, the Federal Republic of Germany and Italy jointly develop and manufacture nuclear weapons and delivery systems, and an agreement was signed in April 1958. With the rise of Charles de Gaulle, the joint production and control agreement was suspended indefinitely.  President John F. Kennedy, a staunch enemy of nuclear proliferation, considered the sale of such weapons “in the event of war, since the United States would be prepared from the outset to defend the Federal Republic.”  Physicists at the Max Planck Institute for Theoretical Physics in Gottingen and other renowned universities would have had the scientific ability to develop selfishly, but the will was lacking and there was also no public support. With Adenauer`s fourth term in sight in November 1961 and the end of his chancery, his “nuclear ambitions” began to rejuvenate.
At the Petersberg Agreement in November 1949, he obtained some of the first Allied concessions, such as a reduction in the number of factories to be dismantled, but in particular his agreement to join the International Authority for the Ruhr, drew strong criticism.