June 15: The Ottoman Empire defeats the Serbs and Bosnians in the Battle of Kosovo in 1389.

Sultan Murad Hüdavendigâr

Islamic Ottoman Empire expanded dramatically from east to challenge the Byzantine Empire. Finally, the Ottomans conquered the Byzantines.

Prince Lazar Hrebeljanović

En route to Byzantium, the Ottoman eyes were on Serbia for conquest. The June 15, 1389, the Ottoman forces annihilated the Serbian opposition.

Prince Lazar of Serbia took over and began to prepare for the coming conflict with the Ottomans. Eventually, the Ottoman Empire managed to extend the Balkans, leaving the Islamic seed sown, and finally the Byzantine Empire fell to the Ottoman Turks in 1453.

The Ottoman Empire

The Modern Age begins with the fall of Constantinople, capital of the Eastern Roman Empire or Byzantine Empire.