In April 1945, he was given command of Battle Group Heissmeyer, a collection of Volkssturm and Hitlerjugend tasked with protecting the Spandau airfield outside Berlin.
In computer games Hitman: Codename 47 and Hitman: Contracts, a character named Frantz Fuchs is an Austrian terrorist, who served in Hitlerjugend as a youngster, planning to blow up a hotel at which a peace summit is being held.
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.