The balkans The declining powers and collapse of the Ottoman, otherwise the sick man of Europe, empire made the soviet to focus their interests to the Balkans. this was especially after the japanese invasion and acquisition of Manchuria. This renewed interests in the Balkan states sparked the conflict that brought about the wars.
Underground Railroad = Secret routes
Answer:
Near the end of WWII, Soviet troops had marched through all of Eastern Europe in an attempt to capture the German capitol of Berlin. Obviously, they were successful, and forced their socialist policies upon the people of East Berlin. In an attempt to keep people subject to these policies, they built the Berlin Wall.