The concept of the Eastern Bloc is a nebulous one and, therefore, worth taking the time to dismantle and simplify as much as possible.
Central Europe - Wikipedia
This is a 1939 map of Russia/ Soviet Union. The other side of the map is Asia. The map is 11x14, great for framing. I save you the hassle of finding
1939 map of Russia Soviet Union 2 sided Asia for framing Colliers World Atlas
Eastern Europe Map, Eastern European countries
1941 Vintage EASTERN EUROPE Map Soviet Union Ukraine Poland Georgia Map 9951
Hammond's Self-Revising World Atlas and Gazetteer
Crafty Moms Share: Ways to Use a World Atlas in Different Lessons
Iron Curtain - WorldAtlas
West Germany - WorldAtlas
National Geographic Student World Atlas Sixth Edition
What Are The Five Regions Of Asia? - WorldAtlas