The Molotov–Ribbentrop Pact, named after the Soviet foreign minister Vyacheslav Molotov and the German foreign minister Joachim von Ribbentrop, officially the Treaty of Non-aggression between Germany and the Union of Soviet Socialist Republics, was a non-aggression pact signed between Nazi Germany and the Soviet Union in Moscow on 23 August 1939. It is also known as the Ribbentrop–Molotov Pact or the Nazi–Soviet Pact.