<Table> <Tr> <Th_colspan="2"> Battle of Kosovo </Th> </Tr> <Tr> <Td_colspan="2"> Part of the Ottoman wars in Europe and Serbian - Ottoman Wars </Td> </Tr> <Tr> <Td_colspan="2"> 16th - century Russian miniature of the battle </Td> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Th> Date </Th> <Td> June 15, 1389 </Td> </Tr> <Tr> <Th> Location </Th> <Td> Kosovo field, District of Branković </Td> </Tr> <Tr> <Th> Result </Th> <Td> <Ul> <Li> Tactically inconclusive </Li> <Li> Strategic Ottoman victory </Li> <Li> Mutual heavy losses--devastating for the less numerous Serbs </Li> </Ul> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Th_colspan="2"> Belligerents </Th> </Tr> <Tr> <Td> Ottoman Empire </Td> <Td> Moravian Serbia District of Branković Kingdom of Bosnia </Td> </Tr> <Tr> <Th_colspan="2"> Commanders and leaders </Th> </Tr> <Tr> <Td> Sultan Murad I † Bayezid I Yakub Çelebi </Td> <Td> Prince Lazar † Vuk Branković Vlatko Vuković </Td> </Tr> <Tr> <Th_colspan="2"> Strength </Th> </Tr> <Tr> <Td> ~ 27,000--40,000 </Td> <Td> ~ 12,000--30,000 </Td> </Tr> <Tr> <Th_colspan="2"> Casualties and losses </Th> </Tr> <Tr> <Td> Sultan Murad I and most of the troops </Td> <Td> Prince Lazar and most of the troops </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Battle of Kosovo </Th> </Tr>

Where was the historic battle in which the ottomans defeated the serbs