 He does not, however, mention the location of the battle.As part of the terms of the peace agreement, Alyattes's daughter Aryenis was married to Cyaxares's son Astyages, and the Halys River (now known as the Kızılırmak River) was declared to be the border of the two warring nations.Cicero mentions that Thales was the first man to successfully predict a solar eclipse during the reign of Astyages.