What message might these frequent and violence changes in leadership have sent to people living outside the roman empire

That the political system was broken and the Empire was no longer strong and cohesive enough to resist takeover by Eurasian peoples moving in.

Explanation: trust me I’m in high school graduating within 2 months. I got you

the answer is a ku klux klan

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in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.