Seven against Thebes
noun
(used with a plural verb) Classical Mythology.
seven heroes, Amphiaraus, Capaneus, Eteoclus, Hippomedon, Parthenopaeus, Polynices, and Tydeus, who led an expedition against Thebes to depose Eteocles in favor of his brother Polynices: the expedition failed, but the Epigoni, the sons of the Seven against Thebes, conquered the city ten years later.
(used with a singular verb) (italics)
a tragedy (468? b.c.) by Aeschylus.
British Dictionary definitions for seven against thebes
Seven against Thebes
pl n
Greek myth
the seven members of an expedition undertaken to regain for Polynices, a son of Oedipus, his share in the throne of Thebes from his usurping brother Eteocles. The seven are usually listed as Polynices, Adrastus, Amphiaraus, Capaneus, Hippomedon, Tydeus, and Parthenopaeus. The campaign failed and the warring brothers killed each other in single combat before the Theban walls
See also Adrastus