Murad, who was now near the age of seventy, would have been glad to end his life in repose, but he was recalled to Europe by an outbreak of the Serbians. It appeared that the Serbian soldiers, on their return to their homes, after the campaign against the Karamanians, told the story of the execution of their comrades by order of Murad. It caused universal indignation among the Serbians. They could not understand a war conducted without the levy of booty from the enemy’s country. The whole of Serbia rose in rebellion. An alliance was formed with Bulgaria, Bosnia, and Albania. Assistance was obtained from Hungary and Wallachia. Murad again took the field in command of an Ottoman army, and, crossing the Balkans, captured Schumla and Tirnova, and then marched towards the Danube. Sisman, the King of Bulgaria, shut himself up in Nicopolis, on the Danube, but was soon compelled to come to terms. He agreed to give up Silistria to the Turks, and to pay a tribute in the future. Lazar, the King of Serbia, in spite of this defection, continued the struggle against the Ottomans, and Sisman himself broke the treaty almost before the ink was dry. He refused to give up Silistria, and sent a contingent in aid of the Serbians. Murad sent part of his army, under Ali Pasha, against Sisman, who was again shut up in Nicopolis. This fortress was captured. Murad was again generous in sparing Sisman’s life, but this time he deprived the southern part of Bulgaria of its autonomy, and insisted on its being completely incorporated in the Turkish Empire. Lazar, the King of Serbia, continued the war. Murad, in spite of his seventy years, led his army, supported, as in Asia Minor, by his two sons. The decisive battle took place on the plain of Kossova, at the point of junction between Serbia and Bulgaria. It was fiercely contested. At a critical point of it a Serbian noble, Milosch Kobilowitch, who on the previous day had been falsely charged in the Serbian camp with disaffection and treason, gave signal proof of his patriotism by riding boldly into the Turkish lines, as though he was a deserter, and claiming that he had a most important message to deliver to the Sultan. He was allowed to approach Murad, and, while kneeling before him, plunged a dagger into his heart, causing a mortal wound. Milosch then made a desperate rush to escape, but in vain. He was captured and brought to the Sultan’s tent. Meanwhile Murad, in spite of his approaching death, was able to give orders for the charge of his reserves, which decided the battle in favour of the Ottomans. The Serbians and their allies were completely defeated and routed. Lazar was taken prisoner and was brought to the Sultan’s tent. Murad lived long enough to direct the execution in his presence of Lazar and Milosch. He then expired.