All 12 books summarized — six of wandering, six of war.
The Aeneid splits cleanly down the middle. Books I–VI are the wandering — the storm at sea, the queen at Carthage, the long story of Troy's fall, the descent into the underworld. Books VII–XII are the war for Italy — the broken peace, the gathering of allies, the death of young Pallas, the final duel. The first half is in conversation with the Odyssey; the second half with the Iliad. Virgil knew his readers would hold both Homeric poems in their heads as they read.
Storm, Carthage, Troy remembered, the underworld.
The poem's first day. Juno's storm wrecks the Trojan fleet. Aeneas is washed up at Carthage, where Queen Dido welcomes him with extraordinary generosity. Venus, scheming for her son's safety, has Cupid take the place of Aeneas's young son Ascanius and sit on the queen's lap during the welcoming feast; Dido — against her own will — begins to love. The book ends with her asking the stranger at her table to tell the story of Troy.
Aeneas tells Dido the story of Troy's fall. The wooden horse, the slaughter at Priam's altar, Aeneas carrying his old father out of the burning city on his back, his small son led by the hand, his wife Creusa lost in the smoke. The book is the poem's most direct argument that pietas — duty to family, gods, and what comes next — is the only thing that can be salvaged when a world ends.
Years at sea, told in one book. False oracles, monstrous harpies, the cave of the Cyclops where Odysseus's old crewman has been left behind. The fleet finally reaches western Sicily, where Anchises — Aeneas's father, the man he carried out of Troy — dies before they can reach Italy. The journey, like the story, is unfinished when Aeneas stops, and Dido has been listening with her whole self.
The emotional center of the poem. Dido and Aeneas come together in a cave during a hunt; the queen calls it marriage. Jupiter, watching, sends Mercury with an explicit order: leave. Dido — abandoned — builds a pyre in the courtyard, climbs it, falls on the sword Aeneas leaves behind, and curses his line. Her last words seed the Punic Wars and the rise of Hannibal. The Trojan ships, already at sea, see the smoke rise from the city.
A year after Anchises's death, the fleet is blown back to his tomb in Sicily. Aeneas holds funeral games — boat race, foot-race, boxing, archery, an arrow that catches fire in mid-air as an omen. The Trojan women, weary of seven years at sea, set fire to the ships; most are saved by a sudden rain Jupiter sends. Anchises appears in a dream and tells his son to meet him in the underworld at Cumae before reaching Italy.
The philosophical heart of the poem. Aeneas descends into the underworld at Cumae with the Sibyl as guide. He meets Dido — she turns away in silence and walks back into the shade. He finds his father in the Elysian Fields, who shows him the parade of unborn Roman souls in a long prophecy ending on the early death of Augustus's young heir Marcellus. The future the founding serves is made visible. So is its cost.
Italy, the broken peace, the duel for Lavinia.
The Trojans land in Italy and notice they are eating their tables — the harpy curse fulfilled. King Latinus offers Aeneas his daughter Lavinia in fulfillment of an oracle. Juno, refusing to yield to fate, releases the fury Allecto from the underworld; she poisons Queen Amata, then Turnus, then the countryside. Within days, the kingdom is at war. The book ends with a great catalogue of Italian warriors — Mezentius, Camilla, Turnus at their head.
Aeneas rows a single ship up the Tiber and is welcomed by old King Evander at the small Greek settlement on the future site of Rome. Evander walks him through what will become the Forum, the Capitol, the Tarpeian Rock. Pallas, Evander's only son, is sent to fight at Aeneas's side. That night Vulcan forges Aeneas a shield engraved with all of Roman history to come — ending at Augustus's victory at Actium against Antony and Cleopatra.
With Aeneas away, Turnus assaults the Trojan camp. The fleet is miraculously transformed by the goddess Cybele into sea-nymphs to escape Turnus's fires. Two young friends, Nisus and Euryalus, slip out for a night raid and do not return — Euryalus's polished helmet catches the moonlight and gives them away. The next day Ascanius, fourteen, makes his first kill in battle, and Apollo comes down to tell him to fight no more.
Jupiter forbids the gods from interfering — fate will decide. Aeneas returns by sea with the Etruscan allies and leaps into the surf in the new armor Vulcan made him. Young Pallas is killed by Turnus, who strips his sword-belt as a trophy — a decision that will undo him. Aeneas, in grief, kills Mezentius's young son Lausus and Mezentius himself. The day belongs to the Trojans, but Pallas is dead.
A truce to bury the dead. Pallas is sent home to his father Evander with a great procession; the old king's grief is unbearable. The Latin council debates peace; Turnus refuses. The fighting resumes. The warrior maiden Camilla leads a brilliant cavalry charge against the Trojans and is killed from cover by a coward named Arruns, with a single javelin. The Italian line breaks. Turnus, hearing the news, rides for the city.
The poem's last book. Single combat is arranged; Juno breaks it through Turnus's sister Juturna; the war resumes. Aeneas is wounded and healed by Venus. Juno yields to Jupiter on the condition that the Trojans take the Latin name and language. The duel happens. Turnus surrenders, asks for mercy. Aeneas hesitates, sees Pallas's belt on his shoulder, and kills him in fury. The poem ends in the next four lines, on a soul going down to the shadows indignant.