In 637 BC, that is in Ardys's seventh regnal year, the Thracian Treres tribe who had migrated across the Thracian Bosporus and invaded Anatolia, under their king Kobos, and in alliance with the Cimmerians and the Lycians, attacked Lydia.
Around 637 BC, during the seventh year of King Ardys's rule, the Thracian Treres tribe, having crossed the Thracian Bosporus and invaded Anatolia, joined forces with the Cimmerians and Lycians to assault Lydia.