What is the reason for the war between the Greeks and the Persians?

There are several reasons for the outbreak of the war between the Persian Empire and the Greek city-states:
1) The desire of the Persian rulers to advance to the Balkans;
2) At that time, Greek culture had a strong influence on other peoples, including the lands of the Persian Empire;
3) The intervention of Athens and other policies in the struggle of the Persians with the Greek colonies in Asia Minor.



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