Etéocles, a son of Oedipus, king of Thebes, agreed on the banishment of his father to govern the state alternately with his brother Polynices, but failing to keep his engagement, the latter appealed to his guardian, out of which there arose the War of the Seven against Thebes, which ended in the slaughter of the whole seven, upon which the brothers thought to end the strife in single combat, when each fell by the sword of the other.