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The Annotated Edition

ARGUMENT OF THE TWENTY-FIRST BOOK. by Homer

Summary, meaning, line-by-line analysis & FAQ.

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This is a brief summary of Book 21 of Homer's *Iliad*, outlining the events leading up to the full text.

Poet
Homer
Themes
anger, death, sorrow
The PoemFull text

ARGUMENT OF THE TWENTY-FIRST BOOK.

Homer

Achilles having separated the Trojans, and driven one part of them to the city and the other into the Scamander, takes twelve young men alive, his intended victims to the manes of Patroclus. The river overflowing his banks with purpose to overwhelm him, is opposed by Vulcan, and gladly relinquishes the attempt. The battle of the gods ensues. Apollo, in the form of Agenor, decoys Achilles from the town, which in the mean time the Trojans enter and shut the gates against him.

Public domain

Sourced from Project Gutenberg

§01Quick summary

What this poem is about

This is a brief summary of Book 21 of Homer's *Iliad*, outlining the events leading up to the full text. Achilles divides the Trojan army, takes twelve prisoners to sacrifice at Patroclus's funeral, battles the river god Scamander, and is ultimately deceived by Apollo, who appears as a Trojan warrior. This trickery leads Achilles to chase after Apollo instead of defending the city walls, allowing the Trojans to retreat safely and secure the gates.

§02Themes

Recurring themes

§03Line by line

Stanza by stanza, with notes

  1. Achilles having separated the Trojans, and driven one part of them to the city and the other into the Scamander…

    Editor's note

    Achilles is in a furious frenzy following Patroclus's death. He slices through the Trojan army as easily as a knife through water—one group races toward the walls of Troy, while the other is driven into the river Scamander. This brutal division of the enemy illustrates his complete control over the battlefield at this time.

  2. …takes twelve young men alive, his intended victims to the manes of Patroclus.

    Editor's note

    The twelve captured Trojans are not killed in battle; instead, they are taken prisoner to be sacrificed at Patroclus's funeral pyre. The term 'Manes' refers to the spirit or shade of a deceased individual in Latin. This act shows the intensity of Achilles' grief and fury: he is not merely fighting; he is enacting a ritual of revenge for his fallen friend.

  3. The river overflowing his banks with purpose to overwhelm him, is opposed by Vulcan…

    Editor's note

    The river god Scamander, also known as Xanthus, confronts Achilles, enraged by the countless Trojan bodies tossed into his waters. In response, the god Vulcan, or Hephaestus in Greek, is dispatched to challenge him. The battle between fire and water is both primal and breathtaking, ultimately causing the river to relent. This moment illustrates how the chaos of war ensnares even the natural world and its deities.

  4. The battle of the gods ensues.

    Editor's note

    With Scamander defeated, the conflict reaches the Olympian gods, who start battling among themselves based on their factions—some back Troy, while others side with the Greeks. This 'Theomachy' (battle of the gods) is one of the most intense and even darkly humorous parts of the *Iliad*, revealing the gods acting with the same pettiness and passion as the humans below.

  5. Apollo, in the form of Agenor, decoys Achilles from the town, which in the mean time the Trojans enter and shut the gates against him.

    Editor's note

    Apollo disguises himself as the Trojan warrior Agenor and tricks Achilles into chasing him away from the city gates. This is a clever ruse — a god in disguise stalling for time. As Achilles races after this illusion, the actual Trojans rush back through the gates of Troy and slam them shut. Achilles finds himself outside, seething with anger and feeling outsmarted, which sets the scene for his ultimate showdown with Hector in Book 22.

§04Tone & mood

How this poem feels

The tone is brisk and martial — this is a practical summary, not a lyrical poem, so it moves quickly and focuses on action. There's a deep current of raw grief behind everything Achilles does, along with a dark grandeur to the unfolding events: rivers swell, gods clash, and one man's fury transforms the battlefield. The closing scene of Achilles being deceived and left standing outside locked gates carries a sense of bitter irony.

§05Symbols & metaphors

Symbols & metaphors

The River Scamander
Scamander isn’t merely a geographical feature — as a god, he embodies nature fighting back against human brutality. When Achilles floods the river with Trojan bodies, Scamander's rage serves as nature's outcry against the magnitude of the massacre. His eventual defeat by Vulcan's fire shows that even nature can't hold back Achilles at this point.
The Twelve Prisoners
The twelve young Trojans taken alive represent grief turned into ritual vengeance. They aren't enemies to be defeated in battle; they're offerings. Their capture illustrates how profoundly Patroclus's death has altered Achilles, transforming him from a warrior into something resembling a priest of destruction.
Apollo's Disguise
Apollo's transformation into Agenor represents fate's struggle against Achilles' anger. Troy is not ready to fall yet—the gods will employ trickery to postpone its downfall. This disguise also highlights a recurring theme in the *Iliad*: the gods shape human affairs while hiding their true identities, and even the strongest mortals can't always distinguish between what is real and what is illusion.
The Shut Gates
The closing of Troy's gates at the end of the book creates a striking image of the city's final stand. They symbolize the line between survival and destruction. For Achilles, the barred gates are a source of irritation; for the Trojans inside, they offer a brief moment of safety. But these gates won't last forever.

§06Historical context

Historical context

The *Iliad* is an ancient Greek epic poem traditionally credited to Homer, written around the 8th century BCE, although it draws from oral stories that are much older. The poem spans a few weeks toward the end of the ten-year Trojan War and centers on the fury of Achilles, a Greek hero. Book 21 is near the climax of the poem: Achilles has rejoined the fight after the loss of his dear friend Patroclus, and his sorrow has transformed into something fearsome. The "Argument" at the beginning of each book was a common element in classical and early modern editions, providing readers with a guide to what’s to come. This specific argument likely originates from a translation in the style of Pope or Chapman, which included prose summaries to aid readers in understanding the epic's vastness. The battle of the gods (Theomachy) featured in this book is among the most renowned and distinctive sections of the *Iliad*.

§07FAQ

Questions readers ask

In older editions of long poems, an 'argument' refers to a brief prose summary that outlines what occurs in that section. You can think of it like a chapter synopsis. This summary was included at the beginning of each book to help readers get their bearings before immersing themselves in the verse. Milton followed this practice in *Paradise Lost*.

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