After Eugene's death in 1736, the Austrian conquests in Serbia and Wallachia were undone at the Battle of Grocka in 1739, where the outnumbered and disorderly Austrians were defeated by the Ottomans. As a result, with the Treaty of Belgrade (1739), the Habsburgs ceded Serbia (including Belgrade), the southern part of the Banat of Temeswar and northern Bosnia to the Ottomans, and the Banat of Craiova (Oltenia), gained by the Treaty of Passarowitz in 1718, to Wallachia (an Ottoman subject), and set the demarcation line to the rivers Sava and Danube.