During World War II, Poland was occupied by Nazi Germany and the Soviet Union following the invasion in September 1939, and it was formally concluded with the defeat of Germany by the Allies in May 19
Beginning of Lebensraum, the German expulsion of Poles from western Poland, 1939
Operation Tannenberg, October 1939, mass murder of Polish townsmen in western Poland
German and Soviet soldiers stroll around Sambir after the German-Soviet invasion of Poland.
Expulsion of Poles from western Poland, with Poles led to the trains under German army escort, 1939.
Molotov–Ribbentrop Pact
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The Molotov–Ribbentrop Pact, officially the Treaty of Non-Aggression between Germany and the Union of Soviet Socialist Republics, was a non-aggression pact between Nazi Germany and the Soviet Union, w
Stalin and Ribbentrop shaking hands after the signing of the pact in the Kremlin
Molotov (left) and Ribbentrop at the signing of the pact
"The Prussian Tribute in Moscow" in the Polish satirical newspaper Mucha of 8 September 1939
The New York Times reported Nazi troop movement on 25 August 1939, soon before the Gleiwitz incident on 31 August 1939, led by Alfred Naujocks (pictured).