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GREEK MYTHOSThe Godsunder Codex

DIOMEDES OF THRACE (son of Ares)

Figure of myth · son of Ares in Greek mythology

Diomedes of Thrace, son of Ares, full-length portrait
Parents
Ares, Cyrene
Siblings
Crestone, Abdera
Haunts and cult places
Thrace
In the sources
17 ancient passages

Brother to Crestone and Abdera, he held dominion over a fierce Thracian people.1 His domain was marked by the terrifying presence of his stables, which struck terror into the region.2

The horses of Diomedes were renowned for their savage nature, eating the flesh of men with hideous joy.3,4,5 Kept in stables near the heights of the Hebrus river, these animals were restrained by iron chains and fed from brass troughs stained with blood.3,5,6 The mares were notorious for eating humans, while the horses generally were said to tear the limbs of men with their jaws.1,6

In the fierce daytime battles, he was wounded and put to flight by Hector alongside other Greeks.7 After the capture of Troy, he returned home with his fleet, and he won the chariot race held in honor of Patroclus.8,9

His fate was sealed when Heracles, destined to fight against him and his horses, killed him during a battle with the Bistones.6,1,5 Heracles tamed the ferocious horses using a bit and then threw Diomedes to them to satisfy their hunger.3,1,5 The king was killed by his own horses after being fed to them.5

Beyond his violent end, Diomedes was remembered for founding the city of Spina and for a promontory in Dalmatia named after him, though some call it the peninsula of Hyllis.10,11 On an island opposite the coast of Apulia, a tomb and shrine stand in his honor, where birds pursue barbarian strangers but show courtesy to Greeks.12 A fable claims his companions were transformed into these birds, while Diomedes himself had previously treated the exiled Oeneus with the respect due to a grandfather.12,13

The codex facts behind this entry

Diomedes was the son of Ares and Cyrene. Apollodorus 2.5.8 +1

In the myths

Heracles killed Diomedes during a battle with the Bistones and threw him to his own horses to satisfy their hunger. Apollodorus 2.5.8 +2 The horses of Diomedes ate the flesh of men with hideous joy. Euripides, Heracles 380-388 +1

Sources

  1. Apollodorus 2.5.8
  2. Pliny, Nat. Hist. 4.18 ¶2
  3. Euripides, Heracles 380-388
  4. Ovid, Heroides 9.61
  5. Diodorus 4.15
  6. Euripides, Alcestis 476-506
  7. Apollodorus, Epitome 4.5
  8. Pausanias 1.28.9
  9. Apollodorus, Epitome 4.7
  10. Pliny, Nat. Hist. 3.20 ¶4
  11. Pliny, Nat. Hist. 3.26 ¶1
  12. Pliny, Nat. Hist. 10.61 ¶1
  13. Pausanias 2.25.2
Written from the Mythos Codex, and every sentence checked against the facts it cites. From the Mythos Codex: 36 facts, each checked against the ancient passage it comes from, here drawn from Apollodorus, Diodorus of Sicily, Euripides, Ovid. Updated 29 October 2026.

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