After the Molotov–Ribbentrop Pact was signed, Daladier responded to the public outcry by outlawing the French Communist Party on the basis that it had refused to condemn Joseph Stalin's actions. During the Danzig Crisis, Daladier was greatly influenced by the advice that he received from Robert Coulondre, the French ambassador in Berlin, that Hitler would back down if France made a firm enough stand toward Poland. On 31 August 1939, Daladier read out to the French cabinet a letter he received from Coulondre: "The trial of strength turns to our advantage. It is only necessary to hold, hold, hold!"