Complex sentence: He joined the Nazi Party in February, 1930 (NSDAP Nr.194 463) and also joined the "Sturmabteilung" (SA) Where he held the title of "Scharführer".
Split into simpler sentences: He joined the Nazi Party in February, 1930 (NSDAP Nr.194 463). Hahn would also join the "Sturmabteilung" (SA) where he held the title of "Scharführer".