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What Religion Threatened The Byzantine Empire?

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What Religion Threatened The Byzantine Empire? In 610, the year Heraclius took the throne, the prophet Muhammad began to preach to the Arabs a religion that became known as Islam. After 634, rising Islamic forces threatened the Byzantine Empire. War now became holy war between rival religions. What groups threatened the Byzantine Empire? List six

What Were The Major Problems Faced By The Eastern Roman Empire After Justinian Died?

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What Were The Major Problems Faced By The Eastern Roman Empire After Justinian Died? After the death of Justinian in 565, the eastern empire began to decline. Faced with invasions by barbarians, Persians, and Muslims, later emperors lost all the land Justinian had gained. The eastern empire remained a major power for several hundred years,