On September 12, 1920, Lenk and his father attended a National-Socialist party meeting in Munich where Adolf Hitler gave a speech.
Lenk requested if he could start a youth organization that would be associated with the NSDAP, and the idea appealed to many and was allowed to be created.
Initially limited to Munich, in 1922 more local groups were still being founded in Bavaria and central Germany and published their own newspapers.
[2] Lenk was then imprisoned, and when he was released, he founded another group, the Greater German Youth Movement.
In 1941, working now in the SA national leadership in Berlin was expelled from the party because he had improperly taken the "Blood Order".