"Since 680 AD the Eastern Roman Empire had faced and endless wave of invasions by Bulgarian tribes. At his point that make 510 years of wars, sieges, invasions, counter invasions and slaughter.
In 1190, on paper at least, the Eastern Empire "ruled" from the Danube down to Greece. But huge areas had been re-populated with less than loyal barbarian tribes and had been burned over producing modest to little tax income for Constantinople.
In 1185 we saw the Uprising of Asen and Peter the theme of Paristrion.
Eastern Roman Emperor Isaac II Angelus, in order to raise money for his wedding with the daughter of King Béla III of Hungary, levied a new tax which fell heavily on the population of the Haemus Mountains. They sent two leaders (Peter and Asen) to negotiate with the emperor. They asked to be added to the roll of the Byzantine army and to be granted land near Haemus to provide the monetary income needed to pay the tax. This was refused, and Peter and Asen were treated roughly. Their response was to threaten revolt….."
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