Question: What is the other name  for a huge area of heavy fighting across Europe with the Soviet Union having occupied and annexed several countries effectively handed over by Nazi Germany?
Sentence (from "European theatre of World War II"): The European theatre of World War II, also known as the Second European War, was a huge area of heavy fighting across Europe, from Germany's and the Soviet Union's joint invasion of Poland in September 1939 until the end of the war with the Soviet Union conquering much of Europe along with the German unconditional surrender on May 8, 1945 (Victory in Europe Day).
Relevant evidence: Yes