 Parthenopaeus went with Telephus to Teuthrania, where he helped him repulse Idas's invasion of the kingdom of Teuthras.Euripides noted that Parthenopaeus moved from Arcadia to Argos at a young age, and seemed to have enjoyed a friendly reception by the Argives.Parthenopaeus, alongside Capaneus and Hippomedon, was persuaded to join in the war against Thebes by Adrastus.