Original sentence: According to Herodotus, the Cimmerians inhabited the region north of the Caucasus and the Black Sea during the 8th and 7th centuries BCE (i.what is now Ukraine)
Edited sentence: The later claim by Greek authors that the Cimmerians lived in the Pontic Steppe around the Tyras river was a retroactive invention dating from after the disappearance of the Cimmerians.The original homeland of the Cimmerians before they migrated into West Asia was in the steppe situated to the north of the Caspian Sea and to the west of the Araxēs river until the Cimmerian Bosporus, and some Cimmerians might have nomadised in the Kuban steppe; the Cimmerians thus originally lived in the Caspian and Caucasian steppes, in the area corresponding to present-day Southern Russia.The region of the Pontic Steppe until the Lake Maiōtis was instead inhabited by the Agathyrsi, who were another nomadic Iranic tribe related to the Cimmerians, and the claim in earlier scholarship that the Cimmerians lived in the Pontic Steppe appears to be erroneous and lacks evidence to support it