He and his group were discovered, and Biermann was sentenced to two years at hard labor at Zuchthaus Lübeck, where he met the lawyer, Herbert Michaelis, and the lathe operator, Bruno Rieboldt.

In 1937, the Resistance group disclosed a secret weapons shipment from Adolf Hitler to Spain's Francisco Franco.

Michaelis passed such information, along with reports of ship movements towards Spain and other materials, to the head of the KPD in Basel, where it was then made public.

[6] In 1942, the Nazis decided to eliminate their Jewish political prisoners, and Biermann was deported to Auschwitz concentration camp, where he was murdered on 22 February 1943.

[8][9][10][11] Biermann is included in the Ernst Thälmann Memorial, and in the book, Streiflichter aus dem Hamburger Widerstand 1933-1945.