After the 7th century, what group posed the greatest threat of the eastern frontiers of Byzantine Empire?
a. the Sassanid Persians
b. the Germans
c. the Huns
d. the Russian Empire
e. the Arab Muslim
Answer: E
After the 7th century, what group posed the greatest threat of the eastern frontiers of Byzantine Empire?
a. the Sassanid Persians
b. the Germans
c. the Huns
d. the Russian Empire
e. the Arab Muslim
Answer: E