An interesting thing about the first battle of Kosovo is that "Prince" Lazar's army apparently included Albanians, Bosnians, Turks and Hungarians and the Turkish army included Serbs, Albanians, Greeks and Italians. The turning point of the battle, at least according to some commentaries, came when Lazar's son-in-law ("Prince" Vuc Branković) turned his forces on Lazar. After the battle, in which the opposing generals were both killed and which the few semi-neutral commentators agree was pretty much a draw, Lazar's widow agreed to Ottoman vassalage in order to get military protection from a Hungarian invasion. Lazar's daughter later married the Ottoman sultan and his son Stefan managed to both lead Ottoman forces against Romanians and Hungarians and lead Hungarian forces against the Turks. The Balkans don't change much.