Original sentence: Southwestern Serbia (Sanjak of Novi Pazar) remained under a de facto Austro-Hungarian occupation between 1878-1913, when it was temporarily returned to the Ottomans, and annexed by Kingdom of Serbia the following year
Edited sentence: Southwestern Serbia (Sanjak of Novi Pazar) remained under a de facto Austro-Hungarian occupation between 1878-1913, when it was temporarily returned to the Ottomans, and conquered by Kingdom of Serbia the following year