The Battle of Kosovo took place on 15 June (old calendar) 28. june (new calendar) 1389 between an army led by the Serbian Prince Lazar Hrebeljanović and an invading army of the Ottoman Empire under the command of Sultan Murad I. It was one of the largest battles of the Late Middle Ages.
https://en.wikipedia.org/wiki/Battle_of_Kosovo
https://en.wikipedia.org/wiki/Battle_of_Kosovo






