By the eighth century b.c. the 12 main city-states of Ionia, including Ephesus, Priene, and Miletus, had formed what was known as the Pan-Ionic League.
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Ephesus, Priene, and Miletus were part of a league of city-states in the region of Ionia.
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The city-states in Ionia were never able to form any kind of alliance.