Question: Walloon Legion, a collaborationist volunteer unit, that served on the Eastern Front, in which war?

Related documents: [0]  [DOC] The Walloon Legion (French: "Légion Wallonie" ) was a collaborationist volunteer unit recruited from Belgium's French-speaking population in Wallonia and Brussels during the German occupation of World War II. The Walloon Legion served in the Wehrmacht, later in the Waffen-SS, on the Eastern Front on both front line and reserve duties. [END] 
[1]  [DOC] 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. It has been known as the Great Patriotic War (Russian: Великая Отечественная Война , "Velikaya Otechestvennaya Voyna") in the former Soviet Union, while in Germany it was called the Eastern Front (German: "die Ostfront" ), the Eastern Campaign ("der Ostfeldzug"), the Russian Campaign ("der Rußlandfeldzug"), or the German-Soviet War by outside parties. [END]  
Answer: World War II
World War II