 After the Achaemenid Empire had been defeated at the Battle of the Eurymedon (c. 469 BC), military action between Greece and Persia was at a standstill.When Artaxerxes I took power, he introduced a new Persian strategy of weakening the Athenians by funding their enemies in Greece.This indirectly caused the Athenians to move the treasury of the Delian League from the island of Delos to the Athenian acropolis.