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.

Can we draw the following conclusion?
The Walloon Legion was partly recruited from Brussels.

Available options:
a). Yes;
b). It's impossible to say;
c). No;
a).