Deutsches Symphonie-Orchester Berlin | Deutsches Museum | Deutsches Theater | Deutsches Museum Flugwerft Schleissheim | Deutsches Nationaltheater and Staatskapelle Weimar | Deutsches Wörterbuch | 12-year-old ''Jungvolk'' platoon commander, Alfred Zech (from Gołuchów, Greater Poland Voivodeship | Zeitschrift für deutsches Altertum und deutsche Literatur | Model of ''Plongeur'' at the Deutsches Museum | Main Gearbox of the Bristol 171 ''Sycamore'' as displayed in the Deutsches Museum | Deutsches Forschungsnetz | ''Deutsches Afrikakorps'' |
In July 1933, when he was 12 years old, Sommer became a member of the Hitlerjugend (Hitler Youth), where he obtained the rank of Jungzugführer in the Deutsche Jungvolk.
In Nazi Germany, the Hitler Jugend, Deutsches Jungvolk and Bund Deutscher Mädel all wore a black neckerchief as part of their uniform, usually folded under the shirt collar.