What part of the United Nations is the most powerful?

United Nations Security Council is the most powerful part of United Nations.

Explanation:

They control the amount of troops that gets sent and to where and they are also incharge of security and peace in the nations.

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.

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explanation:

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