Complex sentence: Furthermore, he addressed the Polish king on 9 January 1470 to support Brandenburg against Pomerania, and on 6 August forbade the Pomeranian dukes to not hinder Brandenburg's appropriation of Pomerania-Stettin, and ordered the nobles to pledge allegiance to the elector.
Split into simpler sentences: Furthermore, he addressed the Polish king on 9 January 1470 to support Brandenburg against Pomerania. On 6 August, the emperor forbade the Pomeranian dukes to hinder Brandenburg's appropriation of Pomerania-Stettin, and ordered the nobles to pledge allegiance to the elector.