This page lists Kings of the Medes, an ancient kingdom in northwestern Iran. The Medes were an Iranian stock, who lived in the western and north-western portion of present-day Iran. ...
By the 6th century BC (prior to Persian assimilation) the Medes were able to establish an empire that stretched from Aran province (the modern-day Republic of Azerbaijan) to north and Central Asia and Afghanistan.
When Cyaxares attacked Lydia, the kings of Cilicia and Babylon intervened and negotiated a peace in 585 BC, whereby the Halys was established as the Medes' frontier with Lydia.
In 553 BC Cyrus the Great, king of Persia, rebelled against his grandfather, the MedeKingAstyages, son of Cyaxares; he finally won a decisive victory in 550 BC resulting in Astyages' capture by his own dissatisfied nobles, who promptly turned him over to the triumphant Cyrus.