What happens in Book X of The Iliad?
Book X opens in the dead of night, with the Greek camp restless and uneasy. Agamemnon, burdened by the pressures of leadership, roams among his men and wakes Menelaus, Nestor, Odysseus, and Diomedes. Nestor suggests sending a spy into the Trojan camp to assess the enemy's plans. Diomedes steps up and selects Odysseus as his partner. Meanwhile, the Trojans hold their own meeting, and Hector sends the Trojan spy Dolon—promised Achilles's horses as a reward—to scout the Greek ships. Odysseus and Diomedes catch up with Dolon on the plain, pursue him, and gather information about the Trojan positions and the newly arrived Thracian king Rhesus, known for his stunning white horses and golden armor. Dolon discloses the location of the Thracian camp before Diomedes kills him without hesitation. The two Greeks then raid the unsuspecting Thracians, killing twelve warriors along with Rhesus. Athena intervenes just as Diomedes is about to claim more spoils, and the duo drives off Rhesus's prized horses, returning to the Greek camp where they are met with relief and celebration.
Analysis
Book X—often referred to as the Doloneia—doesn’t quite fit into the Iliad's overall structure, leading ancient scholars to suspect it was added later. This suspicion serves as a clue to its craft: the episode operates under a different moral framework. While the daylight battles celebrate heroic deeds and open glory, the night raid relies on deception, ambush, and the killing of unsuspecting men. Homer (or whoever wrote this book) uses darkness not just as a backdrop—it creates an ethical atmosphere that suspends the typical rules of the heroic code. Diomedes and Odysseus are an ideal duo for this tonal shift: Diomedes brings raw efficiency, while Odysseus contributes cunning. Their complementary natures reflect the episode's dual structure—Greek spy mission followed by Trojan spy mission—creating a symmetry that turns Dolon's death into a grim punchline instead of a tragedy. Dolon is depicted unsympathetically: he’s physically unimpressive, driven by greed (specifically for Achilles' horses), and quick to betray his comrades when caught. His name, derived from dolos (trick, deceit), feels almost too obvious. Athena’s intervention to limit Diomedes' plundering restores divine order at the episode's end, but the goddess's presence here is more subdued, almost managerial compared to the intense divine interventions in other books. The horses of Rhesus—white, swift, and beautiful—serve as the night’s true prize, a striking contrast to the surrounding darkness of the episode.
Key quotes from Book X
“As a lion springs on sheep or goats left without a shepherd, so Diomedes fell on the Thracians.”
Homer's simile as Diomedes begins his slaughter of the sleeping Thracians, equating his violence with predatory nature rather than heroic contest.
“He begged hard for his life: 'Take me alive; I will pay you a ransom... my father is rich, and will give gold and bronze and wrought iron.'”
Dolon's desperate plea to Odysseus and Diomedes after being run down on the plain, exposing his cowardice and the mercenary logic that drove him to spy in the first place.
“The horses of Rhesus were the finest and largest I have ever seen; they are whiter than snow and fleet as the wind.”
Dolon's own testimony about the Thracian king's horses, the intelligence that seals both his fate and Rhesus's, and which frames the raid's ultimate prize in almost mythic terms.