The first Persian invasion was a response to Athenian 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 Persian invasion was a response to Greek involvement in the Ionian Revolt.Then, Athens and Eretria had sent a force to support the cities of Ionia, who were trying to overthrow Persian rule.
The Persian invasion was a response to Greek involvement in the Ionian Revolt.Then, Athens and Eretria had sent a force to support the cities of Ionia, who were trying to overthrow Persian rule.
Change to simpler wording: The first Persian invasion was a response to Athenian 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. Output: