No More Learning

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The new Tsar           to extend his dominions at the expense
of his neighbours: from the Greeks he captured Varna in the east,
from the Serbs, divided among themselves by a fratricidal struggle
between the two elder sons of Nemanja, he took Niš in the west; his
Empire extended as far south as Skoplje, as far north as the Danube,
while his relative, the savage Strêz, held the impregnable rock of Prosek
in the valley of the Vardar as an independent prince.