The Ottoman army penetrated Pomoravlje and neighbouring areas, killing and looting, then clashed with the subjects of Lazar at Dubravnica (1381), where they were successfully fought off. With a larger force, the Ottoman Sultan Murad I attacked Serbia in 1386, when according to some sources Niš was conquered. The Serbian army emerged victorious, although details of the actual battle are scarce. The victory gave prestige to the Serbs. It was the first serious defeat of the Ottomans in the Balkans.