The modern Albanian-Serbian conflict has its roots in the expulsion of the Albanians in 1877 – 1878 from areas that became incorporated into the Principality of Serbia . During and after the Serbian – Ottoman War of 1876 – 78 , between 30,000 and 70,000 Muslims , mostly Albanians , were expelled by the Serb army from the Sanjak of Niš and fled to the Kosovo Vilayet . At the turn of the century in 1901 , widespread massacres were committed against the Serbian population by the Albanian population across the Kosovo Vilayet
massacres
1901 massacres of Serbs
Kosovo