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History 12 Online
OpenStudy (anonymous):

Why did the Persian Empire decline in power? Fights for the royal throne broke out and governors stopped following orders. A plague that originated in Mesopotamia spread throughout the empire. Zoroastrianism spread throughout the empire and the Greeks invaded. The pharaohs of Egypt's New Kingdom disrupted trade throughout the empire.

OpenStudy (studytheworld):

So many A's in a row! A, Fights for the royal throne broke out and governors stopped following orders is your answer.

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