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.
Not all volunteers in the Walloon Legion were from Brussels.
The volunteer unit was recruited from Belgium's French-speaking population in Wallonia and Brussels, so it included people from Wallonia. The system may not have understood the negative wording 'not all'.