There's a reason most of Eastern Europe hate Russia so much. They kept armies on our territories after WW2 and made sure Communist puppet governments were installed. Their armies and puppet governments then engaged in bloody removal of any opposition. I literally knew people in my village who were put in Siberian gulags and came back scarred. People that came back after the war were arrested by the new puppet regime and put into prison at home were they were tortured and killed. I visited some of those prisons after they were turned into museums and they are ghastly. They set up vast secret police networks with incentives for people to turn in their friends and neighbors. Everyone felt unsafe and you couldn't trust anyone.
There were rebels and freedom fighters that went into hiding and attacked the new regime. A lot of them waited for the Allies to come liberate the country. Most of them died without even finding out that Churchill, Roosevelt and Stalin split Eastern Europe on a piece of napkin at the Yalta conference.
