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The Persian empire had conquered Ionia which was a colonized area with Greeks.

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The Ionians didn't like how the Persians treated them so they started rebeling with the help of the Athenians.

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494 B.C Persia vows to punish Athenians 

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494 B.C Persia vows to punish Athenians 

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In 494 B.C, the Persian emperor, Darius the first, had found out the Athenians were helping the Ionians so he promised to punish the Athenians for helping them.

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In 490 B.C the Persians had landed in Marathon but they were forced back by other Greeks

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In 480 B.C, Xerxes, Darius' successor, had invaded Athens and even sent Persian ships with more than 150,000 soldiers to attack Athens but the Athenians were ready and had formed strong alliances with other city-states including Sparta which was the battle of Thermopylea.

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A small Greek fleet had lured the Persians into a trap into the strait of Salamis which destroyed a third of the Persian fleet.

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In 497 B.C, a large Greek army and the Persians army went on ships and faught in the first ever naval battle which was the battle of Platea.