Already the military organisation was founded, and the system which had made in the brother of Orchan as Vizier the civil ruler of the people. Now the settlement in Europe was begun. Murad (or Amurath, as our forefathers called the name), the younger brother of Suleiman, succeeded his father. In less than thirty years he had transformed the face of Southern Europe, and made the Emperor of Rome but a dependent of his power. He landed and established his armies in Thrace. He defeated the Hungarians and Serbians and captured Nisch; he pressed southwards and Adrianople fell into his hands; and then when the circle of Turkish territory was drawn closely round Constantinople, he turned northwards and became the conqueror of the northern lands ruled by princes Christian yet still barbarian, who had long before this conquered them from the Empire. In 1389 Murad was slain, after a great victory, by Milosch Kobilovitsch, the hero of Serbian legend. Bayezid, his son, reigned in his stead; and he began the fatal custom which still further consolidated the monarchy. On the very day of his accession he had his brother murdered, and so wise was the precedent considered that by the time of Mohammed the Conqueror it became a law that every brother of the Sultan should be slain. He began, too, it is asserted, the hideous vices which have stained the Empire of his successors, and which degraded the courts of the Sultan with the guilt of the rulers and the shame of their captives. The battle of Kossova, the last fight of Murad, was followed before long by that of Nicopolis, in which the choicest chivalry of Europe went down before the fierce onslaught of the Turkish squadrons. The captives, all but twenty-four knights, who were spared, were butchered in cold blood in the presence of their comrades, before the tent of Bayezid. Then Bayezid led his hosts to the conquest of Greece; and in 1397 Athens fell before his arms. The Cæsars bowed before him, suffered a mosque to be built within the walls of Constantinople, and actually joined their arms to his for the capture of the one Greek city which remained free in the midst of the European conquests of the Turks. When at last the insolent Sultan demanded that the crown of the Emperors should be yielded to him, and threatened to exterminate the inhabitants of the capital if he were not obeyed, it is said that the nobles replied: "We know our weakness, but we trust in the God of justice, who protects the weak and lowly, and puts down the mighty from on high." It was an answer that befitted the ancient city.