At his death, Cyaxares controlled vast territories: all of Anatolia to the Halys, the whole of western Iran eastward, perhaps as far as the area of modern Tehran, and all of south-western Iran, including Fars. Whether it is appropriate to call these holdings a kingdom is debatable; one suspects that authority over the various peoples, Iranian and non-Iranian, who occupied these territories was exerted in the form of a confederation such as is implied by the ancient Iranian royal title, king of kings.