ly the whole of
Serbia. Later George Brankovi['c] made another alliance with Hungary, and
in 1444, with the help of John Hunyadi, defeated the Turks and liberated
the whole of Serbia as far as the Adriatic, though he remained a tributary
of the Sultan. The same year, however, the Magyars broke the treaty of
peace just concluded with the Turks, and marched against them under their
Polish king, Ladislas; this ended in the disastrous battle of Varna, on
the Black Sea, where the king lost his life. In 1451 Sultan Murad II died
and was succeeded by the Sultan Mohammed. In 1453 this sultan captured
Constantinople (Adrianople had until then been the Turkish capital); in
1456 his armies were besieging Belgrade, but were defeated by John
Hunyadi, who, unfortunately for the Serbs, died of the plague shortly
afterwards. George Brankovi['c] died the same year, and at his death
general disorder spread over the country. The Turks profited by this,
overran the whole of Serbia, and in 1459 captured Smederevo, the last
Serbian stronghold.

Meanwhile Bosnia had been for nearly a hundred years enjoying a false
security as an independent Serb kingdom. Its rulers had hitherto been
known by the title of _Ban_, and were all vassals of the King of Hungary;
but in 1377 Ban Tvrtko profited by the embarrassments of his suzerain in
Poland and proclaimed himself king, the neighbouring kingdom of Serbia
having, after 1371, ceased to exist, and was duly crowned in Saint Sava's
monastery of Mile[)s]evo. The internal history of the kingdom was even
more turbulent than had been that of Serbia. To the endemic troubles of
succession and alternating alliances and wars with foreign powers were
added those of confession. Bosnia was always a no man's land as regards
religion; it was where the Eastern and Western Churches met, and
consequently the rivalry between them there was always, as it is now,
intense and bitter. The Bogomil heresy, too, early took root in Bosnia and
became extremely popular; it was the obvious refuge for those who did not
care to become involved in the strife of the Churches. One of the kings of
Bosnia, Stephen Thomas, who reigned from 1444 till 1461, was himself a
Bogomil, and when at the insistence of the Pope and of the King of
Hungary, whose friendship he was anxious to retain, he renounced his
heresy, became ostensibly a Roman Catholic, and began to persecute the
Bogomils, he brought about a revolution. The rebels fled to the south