The Iliad

=== Exposition (Books 1–4) ===
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The story begins with an invocation to the Muse. The events take place towards the end of the Trojan War, fought between the Trojans and the besieging Achaeans (Homer interchangeably refers to the Greeks as "Achaeans", "Argives" or "Danaans"). The Achaean forces consist of armies from many different Greek kingdoms, led by their respective kings or princes. Agamemnon, king of Mycenae, acts as commander for these united armies.
After nine years of fighting, the Achaeans had sacked some towns allied with Troy, and captured two maidens, Chryseis and Briseis. Agamemnon, the leader, took Chryseis as his concubine; Achilles, the Achaeans' greatest warrior, took Briseis.
Chryses, father of Chryseis and a priest of Apollo, offered Agamemnon a large ransom for the return of his daughter. Agamemnon refused, against the wishes of the other Achaeans, and insulted the priest.
The priest asks Apollo for vengeance, and Apollo inflicts a plague upon the Achaeans to punish them for the rudeness of Agamemnon to his priest. After nine days of plague, Achilles, the leader of the Myrmidon forces and aristos achaion ("best of the Greeks"), calls for an assembly.
Under pressure, Agamemnon agrees to return Chryseis to her father but decides to take Achilles's slave, Briseis, as compensation. Viewing Agamemnon's decision as a huge dishonour in front of the assembled Achaean forces, Achilles furiously declares that he and his men will no longer fight for Agamemnon. Odysseus returns Chryseis to her father, causing Apollo to end the plague.
In the meantime, Agamemnon's messengers take Briseis away. Achilles becomes very upset and prays to his mother, Thetis, a minor goddess and sea nymph. Achilles asks his mother to supplicate Zeus, wanting the Achaeans to be beaten back by the Trojans until their ships are at risk of being burnt. Only then will Agamemnon realise how much the Achaeans need Achilles and restore his honour. Thetis does so, and Zeus agrees. Zeus then sends a dream to Agamemnon, urging him to attack Troy. Agamemnon heeds the dream but first decides to test the Achaean army's morale by telling them to go home. However nine years into the war, the soldiers' morale has worn thin. The plan backfires, and only the intervention of Odysseus, inspired by Athena, stops a rout. Odysseus confronts and beats Thersites, a common soldier who voices discontent about fighting Agamemnon's war.
The Achaeans deploy in companies upon the Trojan plain. When news of the Achaean deployment reaches King Priam, the Trojans respond in a sortie upon the plain. The armies approach each other, but before they meet, Paris, urged by Hector, his brother and hero of Troy, offers to end the war by fighting a duel with Menelaus. Here, the initial cause of the entire war is explained: Helen, wife of Menelaus, and the most beautiful woman in the world, was taken by Paris from Menelaus's home in Sparta. Menelaus and Paris agree to duel; Helen will marry the victor. However, when Paris is defeated, Aphrodite rescues him and leads him to bed with Helen before Menelaus can kill him.
The gods deliberate over whether the war should end here, but Hera convinces Zeus to wait for the utter destruction of Troy. Athena prompts the Trojan archer Pandarus to shoot Menelaus. Menelaus is wounded, and the truce is broken. Fighting breaks out, and many Achaeans and Trojans are killed.

Duels of Greek and Trojan Heroes (Books 5–7)

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In the fighting, Diomedes kills many Trojans, including Pandarus, and defeats Aeneas. Aphrodite rescues Aeneas before he can be killed, but Diomedes attacks her and wounds the goddess's wrist. Apollo faces Diomedes and warns him against warring with gods, which Diomedes ignores. Apollo sends Ares to defeat Diomedes. Many heroes and commanders join in, including Hector, and the gods supporting each side try to influence the battle. Emboldened by Athena, Diomedes wounds Ares and puts him out of action.
Hector rallies the Trojans and prevents a rout. Diomedes and the Trojan Glaucus find common ground after a duel and exchange unequal gifts, sparked by Glaucus's story of Bellerophon. Hector enters the city, urging his mother Hecuba to perform prayers and sacrifices, inciting Paris to battle, and bidding his wife Andromache and son Astyanax farewell on the city walls. He then rejoins the battle. Hector duels with Ajax, but nightfall interrupts the fight, and both sides retire. The Trojans quarrel about returning Helen to the Achaeans. Paris offers to return the treasure he took and give further wealth as compensation, but not Helen, and the offer is refused. Both sides agree to a day's truce to bury the dead. The Achaeans also build a wall and trench to protect their camp and ships.

The Rout of the Greeks (Books 8–15)

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The next morning, Zeus prohibits the gods from interfering, and fighting begins anew. The Trojans prevail and force the Achaeans back to their wall. Hera and Athena are forbidden to help. Night falls before the Trojans can assail the Achaean wall. They camp in the field to attack at first light, and their watchfires light the plain like stars.
Meanwhile, the Achaeans are desperate. Agamemnon admits his error and sends an embassy composed of Odysseus, Ajax, and Phoenix to offer Briseis and extensive gifts to Achilles, if he will return to the fighting. Achilles and his companion Patroclus receive the embassy, yet Achilles angrily refuses the offer, considering the slight to his honour too great. He declares that he will return to battle only if the Trojans reach his ships and threaten them with fire. The embassy returns, unsuccessful.
Later that night, Odysseus and Diomedes venture out to the Trojan lines, kill the Trojan Dolon, and wreak havoc in the camp of some Thracian allies of Troy. In the morning, the fighting is fierce, and Agamemnon, Diomedes, and Odysseus are all wounded. Achilles sends Patroclus from his camp to inquire about the Achaean casualties, and while there, Patroclus is moved to pity by a speech by Nestor. Nestor asks Patroclus to beg Achilles to rejoin the fighting, or if he will not, to lead the army himself wearing Achilles's armor.
The Trojans attack the Achaean wall on foot. Hector leads the terrible fighting, despite an omen that their charge will fail. The Achaeans are overwhelmed and routed, the wall's gate is broken, and Hector charges in. The Achaeans fall back to their ships.
Poseidon pities the Achaeans and decides to disobey Zeus and help them. He rallies the Achaeans' spirits, and they begin to push the Trojans back. Poseidon's grandson Amphimachus is killed in the battle; Poseidon imbues Idomeneus with godly power. Many fall on both sides. The Trojan seer Polydamas urges Hector to fall back because of a bad omen but is ignored.
Hera seduces Zeus and lulls him to sleep, allowing Poseidon to help the Greeks. The Trojans are driven back onto the plain. Ajax wounds Hector, who is then carried back to Troy. Zeus awakes and is enraged by Poseidon's intervention. However, he reassures Hera that Troy is still fated to fall once Hector kills Patroclus. Poseidon is recalled from the battlefield, and Zeus sends Apollo to aid the Trojans. The Trojans once again breach the wall, and the battle reaches the ships.

The Death of Patroclus (Books 16–18)

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Patroclus cannot stand to watch any longer and goes to Achilles, weeping. He admonishes him for his stubbornness and then asks him to allow him to fight in his place, wearing Achilles's armor so that he will be mistaken for him. Achilles relents and lends Patroclus his armor but sends him off with a stern warning to come back once the Trojans have been pushed back and not to pursue them to the walls. Achilles says that after all has been made right, he and Patroclus will take Troy together.
Patroclus leads the Myrmidons into battle and arrives as the Trojans set fire to the first ships. The Trojans are routed by the sudden onslaught, and Patroclus begins his assault by killing Zeus's son Sarpedon, a leading ally of the Trojans. Patroclus, ignoring Achilles's command, pursues and reaches the gates of Troy, where Apollo himself stops him. Patroclus kills Hector's charioteer Cebriones, is weakened by Apollo and Euphorbos, and is finally killed by Hector.
Hector takes Achilles's armor from the fallen Patroclus. The Achaeans fight to retrieve Patroclus's body from the Trojans, who attempt to carry it back to Troy at Hector's command. Antilochus is sent to tell Achilles the news and asks him to help retrieve the body.
When Achilles hears of Patroclus's death, his grief is so overwhelming that his mother, Thetis, hears him from the bottom of the ocean. Thetis grieves too, knowing that Achilles is fated to die if he kills Hector. Although he knows it will seal his own fate, Achilles vows to kill Hector in order to avenge Patroclus.
Achilles is urged to help retrieve Patroclus's body but has no armor to wear. Bathed in a brilliant radiance by Athena, Achilles stands next to the Achaean wall and roars in rage. The Trojans are terrified by his appearance, and the Achaeans manage to bear Patroclus's body away. Polydamas again urges Hector to withdraw into the city; again, Hector refuses, and the Trojans camp on the plain at nightfall.
Achilles mourns Patroclus, brokenhearted. Meanwhile, at Thetis's request, Hephaestus fashions a new set of armor for Achilles, including a magnificently wrought shield.

The Rage of Achilles (Books 19–24)

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In the morning, Thetis brings Achilles his new set of armor, only to find him weeping over Patroclus's body. Achilles arms for battle and rallies the Achaean warriors. Agamemnon gives Achilles all the promised gifts, including Briseis, but Achilles is indifferent to them. The Achaeans take their meal, but Achilles refuses to eat. His horse, Xanthos, prophesies Achilles's death; Achilles is indifferent. Achilles goes into battle, with Automedon driving his chariot.
Zeus lifts the ban on the gods' interference, and the gods freely help both sides. Achilles, burning with rage and grief, slays many Trojans. Achilles slaughters half the Trojans' number in the river, clogging the water with bodies. The river god, Scamander, confronts Achilles and commands him to stop killing Trojans, but Achilles refuses. They fight until Scamander is beaten back by Hephaestus's firestorm. The gods fight amongst themselves. The great gates of the city are opened to receive the fleeing Trojans, and Apollo leads Achilles away from the city by pretending to be a Trojan. When Apollo reveals himself to Achilles, the Trojans have retreated into the safety of the city, all except for Hector.
Despite the pleas of his parents, Priam and Hecuba, Hector resolves to face Achilles. When Achilles approaches, however, Hector's will fails him. He flees and is chased by Achilles around the city. Finally, Athena tricks him into stopping by taking on the form of his brother Deiphobus, and he turns to face his opponent. After a brief duel, Achilles stabs Hector through the neck. Before dying, Hector reminds Achilles that he, too, is fated to die. Achilles strips Hector of his own armour, gloating over his death. Achilles then dishonours Hector's body by lashing it to the back of his chariot and dragging it around the city. Hecuba and Priam lament, with the latter attempting to face Achilles himself. Andromache hears the news and comes to the walls, fainting on seeing the scene below. The Trojans grieve.
The ghost of Patroclus comes to Achilles in a dream, urging him to carry out the burial rites so that his spirit can move on to the Underworld. Patroclus asks Achilles to arrange for their bones to be entombed together in a single urn; Achilles agrees, and Patroclus's body is cremated. The Achaeans hold a day of funeral games, and Achilles gives out the prizes.
Achilles is lost in his grief and spends his days mourning Patroclus and dragging Hector's body behind his chariot. Dismayed by Achilles's continued abuse of Hector's body, Zeus decides that it must be returned to Priam. Led by Hermes, Priam takes a wagon filled with gifts across the plains and into the Achaean camp unnoticed. He clasps Achilles by the knees and begs for his son's body. Achilles is moved to tears and finally relents, softening his anger. The two lament their losses in the war. Achilles agrees to give Hector's body back and to give the Trojans twelve days to properly mourn and bury him. Achilles apologises to Patroclus, fearing he has dishonored him by returning Hector's body. After a meal, Priam carries Hector's body back into Troy. Hector is buried, and the city mourns.