The "Bund Deutscher Mädel" had its roots in the early 1920s, in the first "Mädchenschaften" or "Mädchengruppen", also known as Schwesternschaften der Hitler-Jugend (Sisterhood of the Hitler Youth). In 1930, the BDM was founded, and in 1931 it became the female branch of the Hitler Youth. 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." It did not attract a mass following until the Nazis came to power in January 1933.