Note: Do not rely on this information. It is very old.
Kossovo
Kossovo, a strip of level country on the southeastern frontier of Servia, about which there is a body of literature celebrating the two battles fought on it. The first took place on June 15, 1389, and was fatal to Servian independence, though Sultan Murad I. fell in the fight. The second was the victory in October, 1448, which Murad II. won over Hunyadi, the Hungarian leader.