Complex sentence: Throughout the 18th century, Bežanija's population was exclusively Serbian, but after Ottomans got run out, the arrival of new occupiers, Habsburg forces, encouraged settlement of Germans, Hungarians, and Croats.
Split into simpler sentences: Throughout the 18th century, Bežanija's population was exclusively Serbian. After the Ottomans were ousted, the new hosts-the Habsburg forces-encouraged settlement of Germans, Hungarians, and Croats.