Answer:
wus up
The first cause of the decline of the Byzantine Empire was the Arab Wars. In the west side of Byzantium, conflicts rose and began to cause trouble for the Empire. Italian city-states such as Venice and Genoa were lost to Arabs. ... The effect of the Byzantine's military was the Fourth Crusade.
political reunification with the Western Roman Empire raids from Vandals, Huns, and other barbarian tribes earthquakes, floods, and the eruption of a volcano attacks from European Crusaders, Arabs, and Turks
political insurrections, military rebellions, famine political instability, military conflict, economic crisis political dictatorship, military genocide, severe drought political stability, military peace, economic growth.
k thats it hope helps
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