It was also Stalin's decision. Hitler could not invade Poland without Stalin's assurances. Stalin knew it would mean war in the West, which was in his best interests, since he figured it would result in the Armies of Britain, France and Germany bleeding themselves dry, thus making it easy for the Soviets to swoop in from the East and take the whole continent.
Only one problem, France went down without a fight. Which in the end, was a blessing in disguise.
“It was also Stalin’s decision. Hitler could not invade Poland without Stalin’s assurances. Stalin knew it would mean war in the West, which was in his best interests, since he figured it would result in the Armies of Britain, France and Germany bleeding themselves dry, thus making it easy for the Soviets to swoop in from the East and take the whole continent.”
Poland was invaded simultaneously by the Soviet Union and Germany; the hypocrisy of Britain & France not declaring war on the USSR in 1939 still stinks to this day. The countries of Eastern Europe that were betrayed to the Soviets BEFORE 1941 (Poland, Latvia, Lithuania, Estonia, Finland) remember this well, and don’t understand why anyone would celebrate any battles in western Europe (like Normandy). All save Finland were given to Uncle Joe for nearly fifty years of murder & repression; the allied troops who died in a war declared for Poland’s sake were simply squandered in the end - they never liberated Poland.