Meanwhile, the British government has asked Benea to ask for 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. The Sudeten Germans were invited by Hitler to the prairies to avoid compromise, and the SdP organized demonstrations which, on 7 September, provoked a police operation in Ostrava, during which two of its deputies were arrested.  The Sudeten Germans used the incident and the false allegations of other atrocities as a pretext to interrupt further negotiations.
  The Munich Convention (Czech: Mnichovska dohoda; in Slovak: Mnechovska dohoda; in German: Munchner Abkommen) or Munchner Verrat (Czech: Mnichovska zrada; The Slovak: Mnechovska zrada) was an agreement reached on 30 September 1938 in Munich by Nazi Germany, the United Kingdom, the Third French Republic and the Kingdom of Italy. It granted Germany the “transfer of the German territory of the Sudetenland” from Czechoslovakia.  Most of Europe celebrated the agreement because it prevented the war threatened by Adolf Hitler by allowing the annexation of the Sudetenland by Nazi Germany, a region of Western Czechoslovakia inhabited by more than 3 million people, mainly German-speaking. Hitler declared that this was his last territorial claim in Europe, and the choice seemed to lie between war and appeasement. 29-30 September 1938: Germany, Italy, Great Britain and France sign the Munich Agreement by which Czechoslovakia must cede its border and defensive regions (the so-called Sudetenland) to Nazi Germany.