Murad fought against the powerful beylik of Karaman in Anatolia and against the Serbs, Albanians, Bulgarians and Hungarians in Europe. In particular, a Serb expedition to expel the Turks from Adrianople led by the Serbian brothers King Vukašin and Despot Uglješa, was defeated on September 26, 1371, by Murad's capable second lieutenant Lala Şâhin Paşa, the first governor ("beylerbey") of Rumeli. In 1385, Sofia fell to the Ottomans. In 1386 Prince Lazar Hrebeljanović defeated an Ottoman force at the Battle of Pločnik. The Ottoman army suffered heavy casualties, and was unable to capture Niš on the way back.