Answer :
After a crushing defeat at the Plain of Marathon, the Persian ruler who sought revenge against the Greek states was King Xerxes I.
Following the Battle of Marathon in 490 BCE, where the outnumbered Greeks successfully repelled the Persian invasion, King Darius I of Persia passed away, and his son Xerxes I ascended to the throne. Seeking revenge for the defeat, Xerxes I embarked on a new invasion of Greece in 480 BCE. He assembled a massive army and navy to conquer the Greek city-states and punish Athens in particular. This campaign ultimately led to famous battles such as Thermopylae and Salamis, which shaped the course of the Greco-Persian Wars and the eventual Greek victory.
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