Introduction: The Daunting Odyssey of Heracles
The Heroic Tale of Heracles, the Greek demigod Heracles, also known as Hercules, is renowned for his incredible feats and enduring strength. One of the most captivating episodes in his saga is the tale of his encounter with the fearsome man-eating horses of King Diomedes. As we delve into this captivating myth, we uncover the daring journey of Heracles to Thrace, where he confronted these monstrous steeds and emerged victorious. Join us as we traverse through the narrative of bravery, treachery, and divine intervention.
The Lurking Peril: Diomedes’ Man-Eating Horses

The Fiery Origin of the Mares
The man-eating horses belonged to King Diomedes, ruler of the Bistones tribe—a ferocious Thracian people known for their martial prowess. Thrace, a region encompassing parts of modern Greece, Bulgaria, and Turkey, was a wild terrain inhabited by savage barbarians, adding to the aura of danger that surrounded the horses. Diomedes, being a son of the god of war, Ares, and Cyrene, was infamous for possessing these malevolent mares.
The Heroic Tale of Heracles Quest: A Treacherous Expedition to Thrace
Heracles, along with his comrades, embarked on a perilous voyage to Thrace to capture the formidable mares. Upon arriving in Thrace, Heracles faced an unexpected obstacle—a vast plain below sea level that blocked his path. In a brilliant display of ingenuity, he devised a plan to flood the plain by digging a canal, successfully outmaneuvering his adversaries. To isolate the horses, he dispatched their caretakers into the sea, a strategic move that highlighted his resourcefulness.
The Savage Nature of Diomedes’ Horses

According to Diodorus Siculus, the feeding-troughs of these horses were made of brass due to their savage nature. Iron chains restrained them, a testament to their immense strength. Their diet comprised not the natural produce of the land, but the flesh of unfortunate strangers. These steeds represented a dire threat, as they tore apart the limbs of hapless victims to satisfy their gruesome hunger.
Tragedy Strikes: Abderus’ Fateful Encounter
In a tragic turn of events, Heracles entrusted his friend Abderus, son of Hermes, with the responsibility of managing the horses. However, the mares proved to be uncontrollable, either dragging Abderus to his demise or consuming him. This somber incident underscored the perilous nature of the task at hand and the untamed ferocity of the mares.
The Tale Unfolds: Different Versions of the Outcome
The aftermath of the encounter diverges in various accounts. Pseudo-Apollodorus recounts Heracles’ victory over Diomedes and the foundation of Abdera—a city near the site of Abderus’ tragic end. Contrarily, Diodorus’ version paints a more ironic picture, where Heracles feeds Diomedes to his own vicious mares. This act of retribution restores divine order, as Diomedes had defied natural law by teaching his steeds to consume humans.
Heracles’ Triumph and Legacy
Heracles, triumphant in his mission, tamed the once-man-eating mares and returned them to his cousin, Eurystheus, who held authority over his labors. Diodorus claims that Eurystheus dedicated the horses to the goddess Hera, and their descendants persisted through the era of Alexander the Great. Pseudo-Apollodorus, however, suggests that the horses were set free by Eurystheus, only to meet their end on Mount Olympus, devoured by wild beasts.
Conclusion: A Saga of Heroism and Divine Justice
The Heroic Tale of Heracles’ encounter with Diomedes’ man-eating horses encapsulates the essence of Greek mythology—bravery, tragedy, and divine retribution. Through cunning and valor, Heracles overcame the perilous challenge, restoring order and prevailing over the forces of chaos. This myth serves as a reminder of the intricate interplay between gods and mortals and the enduring legacy of heroic exploits.
Who was King Diomedes?
King Diomedes was the ruler of the Bistones tribe, known for owning man-eating horses in ancient Thrace.
How did Heracles manage to capture the mares?
Heracles and his companions sailed to Thrace, where he outwitted his enemies by flooding a sea-level plain and isolating the mares.
What fate befell Abderus?
Abderus, entrusted with the horses, met a tragic end as he was either dragged to death by the mares or consumed by them.
How did different accounts interpret the aftermath?
Pseudo-Apollodorus recounts Heracles’ victory and the founding of Abdera, while Diodorus suggests Heracles fed Diomedes to his own mares.
What is the significance of this myth?
This myth highlights themes of heroism, divine justice, and the intricate relationship between gods and mortals in ancient Greek mythology.