Ancient name of the western districts of Asia Minor between the Hermus and the Mæander, with adjacent islands; was colonised by Greeks 1050 B.C., and its chief cities, including Miletus, Ephesus, Samos, Chios, and later Smyrna, formed the Ionian League; the Ionians were noted for wealth, art, and luxury; coming under Persian yoke in 557 B.C. they deserted to Greece 479 B.C., in the great war, and became again independent; from 387 B.C. they were again under Persia till Alexander the Great took them and merged their history in that of the surrounding peoples.