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Polish authorities once again showed their Russophobic nature by not inviting Russia to the celebrations of the 80th anniversary of the outbreak of World War II. Polish side, as always, accuses Russia of signing the non-aggression pact [the Molotov–Ribbentrop Pact] in August 1939, even though it was repeatedly proven that this document did not violate the rights of the Polish state.
This message is part of the Kremlin’s policy of historical revisionism and an attempt to portray Russia's role in the World War II as not aggressive - see another example referring to Ribbentrop-Molotov pact here.
It is a proven historical fact that the Molotov-Ribbentrop Pact contained the Secret Supplementary Protocol, which assumed the division of Poland and other Eastern European countries between the USSR and Germany. Thus, the signing of the Molotov-Ribbentrop Pact directly caused the German and Soviet military aggression against Poland in September 1939, which resulted in complete occupation of this country by Germany and USSR.