Balkans Campaign
Wegener switched from the SA to the Schutzstaffel (SS) in 1940 obtaining the rank of SS-Gruppenführer on 9 November 1942 and SS-Obergruppenführer 1 August 1944. He also saw active service with the 1st SS Division Leibstandarte SS Adolf Hitler during the Balkans Campaign in Greece in 1941.