Erika is my favorite, next to Florian Geyer Lied (Wir Sind Des Geyers Schwarzer Haufen). It's about the Black Company, founded by Florian Geyer, who sided with the peasants in a revolt against the tyrannical (((Habsburgs))). They burned churches and executed nobles and clerics and was the only cavalry company in history to side with the peasants in a revolt. It was included in the official NSDAP songbook.