Hey, kudos for finishing Elementary Principles of Philosophy! credit due where credit is due, it’s a phenomenal book and hopefully you understand Dialectical and Historical Materialism more.

Anyway, the core of the matter is that the historical evidence I have seen based on a combination of reading historical books, reading primary sources, and more have led me to have what I believe to be a different understanding of events in both qualitative and quantitative degrees. As an example, the Molotov-Ribbentrop Non-aggression pact. This was a strategic pact made because the USSR tried to align with the west against the Nazis prior to it in order to save Czechoslovakia, but the West denied and sacrificed it, hoping the Soviets and Nazis would kill each other off. It wasn’t an alliance, but a means to force the allies to later join the war.

You admit to having no understanding outside Wikipedia articles, which means you have some serious digging to do.