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Persia sent a punitive expedition against Eretria and Athens for their interference in Asia Minor. Eretria was taken when traitors opened the gates. The Persians then moved on to Athens, landing on the Plain of Marathon. The Athenians waited in the hills for reinforcement from Sparta, out of reach of the Persian cavalry. After 10 days, they saw the Persian cavalry being loaded onto ships. They took the opportunity and ran down and defeated the inferior Persian infantry without its cavalry protection.

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9y ago

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