In the face of tensions between the Germans and the Czechoslovakian government, on 15 September 1938, Benes secretly proposed to cede 6,000 square kilometres to Czechoslovakia in Germany, in exchange for a German accession agreement of 1.5 to 2.0 million South Germans that expelled Czechoslovakia. Hitler did not respond.  On 22 September Chamberlain, who wanted to go to Bad Godesberg for further conversations just before his plane to Germany, told the press who met him there that “my goal is peace in Europe, I hope this journey is the way to that peace.”  Chamberlain came to Cologne, where he received a big reception with a German band that played “God Save the King” and Germans who offered flowers and gifts to Chamberlain.  Chamberlain had calculated that full acceptance of the German annexation of all Sudetenland without reduction would force Hitler to accept the agreement.  When Hitler heard, he replied, “Does this mean that the Allies have accepted the transfer of the Sudetenland to Germany?”, Chamberlain replied “Exactly,” to which Hitler replied by shaking his head, saying that the Allies` offer was insufficient. He told Chamberlain that he wanted Czechoslovakia to be completely dissolved and its territories redistributed to Germany, Poland and Hungary, and told Chamberlain to take them or leave them.  Chamberlain was upset by this statement.  Hitler added to Chamberlain that the assassination of Germans since his last meeting, 15 Czechoslovakia, of which Hitler was part of the assassination of Germans, made the situation unbearable for Germany.  Meanwhile, the British government has asked Benea to request a mediator. As he did not want to sever his government`s relations with Western Europe, the heirs reluctantly agreed.
The British appointed Lord Runciman, the former Liberal cabinet minister, who arrived in Prague on 3 August to convince Benes to accept an acceptable plan for the Sudeten Germans.  On 20 July, Bonnet informed the Czechoslovakian ambassador in Paris that France, while publicly declaring its support for the Czechoslovakian negotiations, was not prepared to go to war on the Sudetenland.  In August, the German press was full of stories of Czechoslovakian atrocities against the Sudeten Germans, with the intention of forcing the West to put pressure on the Czechoslovakians to make concessions.  Hitler hoped that the Czechoslovaks would refuse and that the West would feel morally justified in abandoning the Czechoslovaks to their fate.  In August, Germany sent 750,000 troops along the border with Czechoslovakia, officially as part of military maneuvers.   On September 4 or 5, Erbe presented the fourth plan, which met almost all of the requirements of the agreement.