Question: Walloon Legion, a collaborationist volunteer unit, that served on the Eastern Front, in which war?
Sentence (from "Eastern Front (World War II)"): The Eastern Front of World War II was a theatre of conflict between the European Axis powers and co-belligerent Finland against the Soviet Union, Poland and other Allies, which encompassed Northern, Southern and Central and Eastern Europe from 22 June 1941 to 9 May 1945.
Relevant evidence: Yes