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The first Persian invasion was a response to Greek involvement in the Ionian Revolt, when Athens and Eretria had sent a force to support the cities of Ionia in their attempt to overthrow Persian rule. The Athenians and Eretrians had succeeded in capturing and burning Sardis, but they were then forced to retreat with heavy losses. In response to this raid, Darius swore to burn down Athens and Eritrea. According to Herodotus, Darius asked for his bow, he placed an arrow upon the string and he discharged it upwards towards heaven, and as he shot into the air he said: "Zeus, grant me to take vengeance upon the Athenians!". Also he charged one of his servants, to say "Master, remember the Athenians." three times before dinner each day.[4]
