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?
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). The Allied forces fought the Axis powers on two major fronts (the Eastern Front and Western Front) as well as in the adjoining Mediterranean and Middle East theatre.
Carpathian Ruthenia during World War II Carpathian Ruthenia was a region in the easternmost part of Czechoslovakia (Subcarpathian Ruthenia, or Transcarpathia) that became autonomous within that country in September 1938, declared its independence as the "Republic of Carpatho-Ukraine” in March 1939, was immediately invaded and annexed by Hungary, invaded by the Soviet Red Army in 1944 and incorporated into the Ukrainian Soviet Socialist Republic in 1946.