Stadelheim Prison
Ackermann became contributing editor of the "Weißenburger Tagblatt" in 1917, and of the "Telegraphen-Union" in Munich. He was permanent Landtag rapporteur for the "Münchner Zeitung" and the "Bayerische Staatszeitung". During the Third Reich he was imprisoned in Stadelheim Prison, in the KZs Dachau, Buchenwald and Dora-Mittelbau.