Complex sentence: During World War II Bischoff served as the leader of Einsatzkommando 1/IV in Poland and as chief of the Gestapo in Poznań (Posen) and Magdeburg.
Split into simpler sentences: During World War II Bischoff served as the leader of Einsatzkommando 1/IV in Poland. He was also chief of the Gestapo in Poznań (Posen) and Magdeburg.