The settlement formerly known as "Trachis" was renamed "Heraclea in Trachis/Trachinia" by the Spartans, who sent a garrison in 427 BC to guard the Trachinian plain against the marauding highland tribes of Oeta, and built a citadel close by the Asopus gorge. But their attempted settlement during the Peloponnesian war failed, due to the hostility of the Thessalians.Dictionary of Greek and Roman Geography (1854)
