On August 23, 1939, a German delegation headed by Foreign Minister Joachim von Ribbentrop arrived to Moscow, and in the following night the Molotov–Ribbentrop Pact was signed by him and his Soviet colleague Vyacheslav Molotov, in the presence of Soviet leader Joseph Stalin.[104] The ten-year pact of non-aggression declared both parties' continued adherence to the Treaty of Berlin (1926), but the pact was also supplemented by a secret additional protocol, which divided Eastern Europe into German and Soviet zones of influence:[105]