Now to others there arose in other ways obstacles to their increase; and in the case of the Ionians, when their power had advanced to a high pitch, Cyrus and the Persian kingdom, having subdued Croesus and all within the Halys to the sea, marched against them, and reduced to bondage their cities on the mainland, as Darius afterwards did even the islands, conquering them by means of the fleet of the Phoenicians.