The Seven Against Thebes — Aeschylus

Third play of a trilogy (the other two are lost) about the doomed family of Laius and Oedipus and his sons. After the city of Thebes has banished Oedipus, the former ruler's sons vie for the crown. The victor, Eteocles, expels his brother, Polyneices, who flees to Argos and recruits a force of seven champions to lead an assault on Thebes, with a tragic outcome.