The Battle of Kosovo (, ) took place on 15 June 1389 between the army led by the Serbian Prince Lazar Hrebeljanovic, and the invading army of the Ottoman Empire under the command of Sultan Murad Hüdavendigâr. The army under Prince Lazar consisted of his own troops, a contingent led by Serbian nobleman Vuk Brankovic, and a contingent sent from Bosnia by King Tvrtko I, commanded by Vlatko Vukovic. Prince Lazar was the ruler of Moravian Serbia, and the most powerful among the Serbian regional lords of the time, while Vuk Brankovic ruled District of Brankovic located in a part of Kosovo and other areas, recognizing Lazar as his overlord. The battle was fought on the in Kosovo field, in the territory ruled by Brankovic, in what is today Kosovo. Its site is about 5 kilometers northwest of the modern city of Prishtina.