dynasty, and from where Croesus's own mother originated, under the direct control of the Lydian Empire. Thus, according to Herodotus, Croesus ruled over all the peoples to the west of the Halys River - the Lydians, Phrygians, Mysians, Mariandyni, Chalybes, Paphlagonians, Thyni and Bithyni Thracians, Carians, Ionians, Dorians, Aeolians, and Pamphylians. However information only about the relations between the Lydians and the Phrygians is attested in both literary and archaeological sources, and there is no available data concerning relations between the other mentioned peoples and the Lydian kings; moreover, given this was the situation detailed by Herodotus under the reign of Croesus, it is very likely that a number of these populations had already been conquered under Alyattes. The only populations Herodotus claimed were independent of the Lydian Empire were the Lycians, who lived in a mountainous country which would not have been accessible to the Lydian armies, and the Cilicians, who had already been conquered by Neo-Babylonian Empire. Modern estimates nevertheless suggest that it is not impossible that the Lydians might have subjected Lycia, given that the Lycian coast would have been important for the Lydians because it was close to a trade route connecting the Aegean region, the Levant, and Cyprus. Modern studies also consider doubtful the Graeco-Roman historians' traditional account of the Halys River as having been set as the border between the Lydian and the Median kingdom, which appears to have been a retroactive narrative construction based on symbolic role assigned by Greeks to the Halys as the separation between Lower Asia and Upper Asia as well as on the Halys being a later provincial border within the Achaemenid Empire. The eastern border of the kingdom of Croesus would thus have instead been further to the east of the Halys, at an undetermined point in eastern Anatolia. International relations Croesus continued the friendly relations with the Medes concluded by his father Alyattes and the Median king Cyaxares after five years of war in 585 BC, shortly before both their respective deaths that same year. As part of the peace treaty ending the war between Media and Lydia, Croesus's sister Aryenis had married Cyaxares's son and successor Astyages, who thus became Croesus's brother-in-law, while a daughter of Cyaxares might have been married to Croesus. Croesus continued these good relations with the Medes after he succeeded Alyattes and Astyages succeeded Cyaxares. Under Croesus's rule, Lydia continued its good