The Bund Deutscher Mädel had its origins as early as the 1920s, in the first Mädchenschaften or Mädchengruppen, also known as Schwesternschaften der Hitler-Jugend (Sisterhood of the Hitler Youth).
In 1930, it was founded as the female branch of the Hitler Youth movement. The league of German Maidens was nicknamed "The League of German Mattresses", perhaps suggesting sexual promiscuity between the gender-separated groups. Its full title was Bund Deutscher Mädel in der Hitler-Jugend (League of German Girls in the Hitler Youth). In the final electioneering campaigns of 1932, Hitler inaugurated it with a mass meeting featuring the League; on election eve, the League and Hitler Youth staged "evening of entertainment."
The Gesetz über die Hitlerjugend (law concerning the Hitler Youth) dated 1 December 1936, forced all eligible juveniles to be a member of HJ or BDM. They had to be ethnic Germans, German citizens and free of hereditary diseases. Girls had to be 10 years of age to enter this League.