________________ was the 2nd Persian invasion. _____________________ was Darius's son who wants to avenge his dad's defeat, so he goes and leads the Persian army. About 30/100 poleis unite and use their terrain to their advantage against the Persians. The Battle of _____________________ was when the Greeks made the Persians go through the Pass of [battle name]. When the Pass plan fails, King Leonidas and the 300 Spartans step in and die defending the Greek retreat.

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