Mnemosyne — Classical Greek Myth Library

Diomedes, son of Tydeus and Deipyle (daughter of Adrastus), belongs to the Epigoni by blood and by deed. Tydeus died at Thebes among the Seven; the son returns a decade later with Alcmaeon, Sthenelus, Thersander, and the rest, and shares in the successful sack. Homer’s Sthenelus, speaking beside Diomedes, boasts that they took Thebes with a smaller host than their fathers—proof that the sons surpassed the failed generation under Zeus’s favor. After the Epigoni war, Diomedes stands as a leading Argive dynast: heir through Tydeus’s marriage into Adrastus’s house, companion of Sthenelus son of Capaneus, and—when the Helen oath and Trojan muster come—commander of a large Argive–Tirynthian contingent in the Catalogue of Ships. The *Iliad* treats him as already proven: Athena’s favorite in Book 5, wounder of Aphrodite and Ares, guest-friend of the Lycian Glaucus through ancestral ties (04/102). His Theban success is the unspoken ground of that Homeric confidence. Later nostos tales (Aegialeia’s betrayal; wanderings to Italy / Daunia) lie beyond this bridge-entry; here the point is the hinge: Epigonus at Thebes, then Argive king and Achaean champion at Troy. Catalogue Diomedes “after Thebes” so the Theban victory remains visible behind the Trojan aristeia.