Then you must also remember that it was Poland that allied with Hitler before anyone else, in hope that Germany will help it to attack Russia. But Hitler had other plans.
Why you always forget about this part of the history? I guess it's not illustrated well in your media blaming Russia for all of your miseries.
You cannot take anyone seriously, who writes "conquest of Poland". Do they even know, what territory they are talking about and how Poland conquered it 20 years earlier? The same Poland, who had their government officials attending NSDAP conferences.
Certainly not by USSR. By the time USSR took their territories back - are you still forgetting, that Poland had conquered their territories mere 20 years earlier? - Poland didn't exist anymore and the Polish government was in exile in Romania. There was nothing to conquest. USSR took back what was taken from them.
And let's not forget that Pilsudski government, while it lasted, was fascist, just like the Germans. They played a game and they lost. Unlike Austria and Czechoslovakia, which were also thrown over the board for the Germany, they were not innocent here and had their own imperial ambitions (did you forget that they took their part in partitioning of Czechoslovakia, just months earlier?)
I will give you few more pointers so you can study it in context:
- (1917-19) Curzon line, establishment of second Polish republic, establishment of Soviet Union, succession of Russian Empire & impact of Brest-Litovsk treaty, succession states of Austro-Hungarian Empire;
- (1918-21) Polish-Soviet War, Poland annexing Soviet territories east of Curzon line;
- 1925, publication of Mein Kampf; outlining geopolitical ambitions of Germany
- Intermarium project, Jozef Pilsudski, geopolitical ambitions of Poland
- Polish relations to Germany in 1930s
- (1938) Munich agreement, role of Poland
- August-September 1939; pay particular attention to timeline of exile of polish government officials, compared to "USSR annexes Poland".
But of course, you can ignore all that and pretend that USSR had a capability to start a war at the time (hint: they barely defended themselves, it was huge diplomatic effort to stall the attack on USSR till 1941).
Second Polish republic was established after WW1, so that might have something with that. Before that, the territory that became Poland was part of Austro-Hungarian empire (that's why I mentioned it above), plus what they conquered from USSR after WW1.
