The Soviet aggression on Poland started without a formal declaration of war on 17 September 1939. It was under the Molotov-Ribbentrop Pact sixteen days after Germany invaded Poland from the west. The invasion ended on 6 October 1939 with the division and annexation of the whole of the Second Polish Republic by Germany and the Soviet Union. The Author highlights the legal aspect of the Soviet aggression in the light of international law and official Soviet propaganda.
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