Seven against Thebes

WordReference Random House Unabridged Dictionary of American English © 2026

Sev′en against′ Thebes′, 

1. Classics 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.
2. (italics) a tragedy (468?b.c.) by Aeschylus.

Collins Concise English Dictionary © HarperCollins Publishers::

Seven against Thebes noun:plural

1. 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