the weakening of the various polities all across Anatolia by the Cimmerian raids and used the lack of a centralised Phrygian state and the traditionally friendly relations between the Lydian and Phrygian elites to extend Lydian rule eastwards to Phrygia. Lydian presence in Phrygia is archaeologically attested by the existence of a Lydian citadel in the Phrygian capital of Gordion, as well as Lydian architectural remains in northwest Phrygia, such as in Dascylium, and in the Phrygian Highlands at Midas City. Lydian troops might have been stationed in the aforementioned locations as well as in Hacıtuğrul, Afyonkarahisar, and Konya, which would have provided to the Lydian kingdom access to the produce and roads of Phrygia. The presence of a Lydian ivory plaque at Kerkenes Daǧ suggests that Alyattes's control of Phrygia might have extended to the east of the Halys River to include the city of Pteria, with the possibility that he may have rebuilt this city and placed a Phrygian ruler there: Pteria's strategic location would have been useful in protecting the Lydian Empire from attacks from the east, and its proximity to the Royal Road would have made of the city an important centre from which caravans could be protected. Phrygia under Lydian rule would continue to be administered by its local elites, such as the ruler of Midas City who held Phrygian royal titles such as (king) and (commander of the armies), but were under the authority of the Lydian kings of Sardis and had a Lydian diplomatic presence at their court, following the framework of the traditional vassalage treaties used since the period of the Hittite and Assyrian empires, and according to which the Lydian king imposed on the vassal rulers a "treaty of vassalage" which allowed the local Phrygian rulers to remain in power, in exchange of which the Phrygian vassals had the duty to provide military support and sometimes offer rich tribute to the Lydian kingdom. The status of Gordion and Dascylium is however less clear, and it is uncertain whether they were also ruled by local Phrygian kings vassal to the Lydian king, or whether they were directly ruled by Lydian governors. With the defeat of the Cimmerians having created a power vacuum in Anatolia, Alyattes continued his expansionist policy in the east, and of all the peoples to the west of the Halys River whom Herodotus claimed Alyattes's successor Croesus ruled over