The emperor, John Palæologus, was obliged to yield to Amurath, the Turkish Sultan, all his lands except Constantinople, Thessalonica, and that part of the Morea which still clung to the empire, and the Turks set up their capital at Adrianople, whence they spread their conquests up to the very walls of Constantinople; but the Greek mountaineers, especially those of the mountain land of Epirus, now called Albania, had something of the old spirit among them, and fought hard.  The Venetians used to take troops of them into their pay, since all Christians made common cause against the Turks; and these soldiers, richly armed, with white Albanian kilts, the remnant of the old Greek tunic, were called Stradiots, from the old Greek word for a soldier, Stratiotes.  The bravest of them all was George Castriotes, a young Albanian, who had been given as a hostage to the Mahommedans when nine years old.  He had been kept a prisoner, and made to fight in the Turkish army, and was so brave there that the Turks called him Skanderbeg, or the Lord Alexander. However, when he thought of the horror of being a Mahommedan, and fighting against the Christian faith and his own country, he fled into Albania, raised all the Greeks, killed all the Turks in the country, and kept it safe from all the further attempts of the Sultan as long as he lived, although, at Varna, a great crusade of all the most adventurous spirits in Europe, to drive back the Turks, was wofully defeated in the year 1446.