Stalin offered a united front to fight the Nazis, they only accepted a non aggression pact when they knew they were on their own, so they needed to industrialize and prepare, and they did, and they defeated the nazis at a massive cost of life. Literally all of this could have been prevented if the French and the British just agreed to join the USSR, but those two had been genociding the globe for centuries at that point so of course they didn’t give a shit if all Slavs were exterminated as long as communism died with them.
Stalin offered a united front to fight the Nazis, they only accepted a non aggression pact when they knew they were on their own, so they needed to industrialize and prepare, and they did, and they defeated the nazis at a massive cost of life. Literally all of this could have been prevented if the French and the British just agreed to join the USSR, but those two had been genociding the globe for centuries at that point so of course they didn’t give a shit if all Slavs were exterminated as long as communism died with them.