Caesar leads his army across the Rubicon into Italian territory, defying Roman law and sparking a civil war.

Conspirators surround and stab Julius Caesar to death in the Senate chamber.

Octavian defeats Mark Antony and Queen Cleopatra's combined naval forces at the Battle of Actium.

The Senate awards Octavian the title Augustus after his final victory over Antony and Cleopatra.

Augustus dies peacefully, having named Tiberius and Livia as his primary heirs in his will.

Tiberius abandons Rome for the island of Capri, where he becomes increasingly brutal and tyrannical.

Tiberius dies despised by the Roman people, naming Caligula and Gemellus as joint heirs to the empire.

Caligula declares himself a living god and demands worship while ruthlessly persecuting members of the Senate.

Conspirators led by praetorian guard member Cassius Chaerea assassinate Caligula, his wife Caesonia, and their daughter.

Soldiers discover Claudius cowering behind a curtain after the assassinations, and the praetorian guard proclaims him emperor.

Agrippina the Younger poisons Claudius to prevent him from turning against her and to secure Nero's succession.

Nero orders the assassination of his own mother, Agrippina the Younger, because she interferes with his rule.

Abandoned by his guards and condemned by the Senate, Nero commits suicide.

Vespasian defeats his rivals in civil war, takes Rome, and establishes the Flavian dynasty as emperor.

Domitian is assassinated by Stephanus, the steward of his wife Domitila, ending the Flavian dynasty.

The twelve biographies in The Lives of the Caesars trace Roman history from Julius Caesar's fateful crossing of the Rubicon through the assassination of the last Flavian emperor, Domitian. Caesar's military supremacy and acceptance of the dictatorship for life provoked his murder in the Senate, but his heir Augustus cleverly assumed all power while presenting himself as a modest republican citizen. After Augustus's peaceful death, the empire passed through rulers ranging from the brutal Tiberius to the monstrous Caligula, whose assassination brought the unexpected emperor Claudius to power. Claudius's murder by his wife paved the way for Nero, whose tyranny triggered a military revolt and his suicide. After a savage civil war, Vespasian established the Flavian dynasty, which ultimately collapsed with the assassination of his tyrannical son Domitian.

The rise and fall of Rome's twelve Caesars.

Caesar is captured by pirates while traveling to Rhodes and, after his release, hunts them down and executes them.

Caesar wins election as Pontifex Maximus through bribery, taking on debt so ruinous that failure would have ended his career.

Caesar systematically conquers the Gallic territories and launches military raids into both Germany and Britain.

Caesar overhauls the Roman calendar, extending the year to 365 days and introducing the concept of a leap year.

Octavian forms an alliance with Mark Antony and Marcus Lepidus to pursue and defeat Julius Caesar's assassins.

Mark Antony and Queen Cleopatra commit suicide after their naval defeat, and Octavian annexes the kingdom of Egypt.

Augustus exiles his daughter Julia for sexual behavior that violated his own moral reform campaigns.

Augustus's grandsons Lucius and Gaius both die, and his grandson Agrippa is disinherited, leaving the succession in crisis.

Augustus and Livia force Tiberius to divorce his beloved wife Vipsania and marry Augustus's widowed daughter Julia instead.

Claudius leads the conquest of Britain, the most significant Roman territorial expansion since Caesar's invasion of Gaul.

Claudius's wife Messalina is executed after she secretly marries the aristocrat Gaius Silius while still empress.

Nero deliberately starts a fire that devastates Rome, then builds his enormous Golden House on the cleared land.

A governor named Galba assumes leadership of the military revolt against Nero after the earlier rebellion of Vindex is suppressed.

Otho commits suicide rather than face capture as his forces begin losing their battle against Vitellius's army.

Titus provides generous personal aid and resources to survivors of the catastrophic eruption of Mount Vesuvius.

Beyond the headline events of each reign, Suetonius fills his biographies with the specific acts, scandals, and consequences that shaped each Caesar's legacy. Julius Caesar's career was forged through audacious exploits like hunting down his pirate captors and winning Rome's highest religious office through debt-financed bribery, culminating in sweeping calendar reforms that still influence modern life. Augustus's reign was haunted by family tragedy, as the deaths of his grandsons and the exile of his daughter created a succession crisis he never fully resolved. Claudius's unexpected conquest of Britain was undone by palace scheming, as his empress Messalina's secret remarriage led to her execution and his own eventual poisoning. Nero's arson of Rome and the Year of the Four Emperors — marked by Otho's battlefield suicide — gave way to the Flavian era, which saw the compassionate Titus aid survivors of the Vesuvius disaster before his sudden death.

Conquests, scandals, and upheavals behind Rome's imperial story.

Caesar delivers eulogies for his aunt and wife, publicly claiming his family descended from gods and ancient royalty.

Caesar allies himself with the powerful generals Pompey and Crassus upon being elected consul, consolidating his political position.

Caesar gives his daughter Julia in marriage to Pompey to formalize and strengthen their political alliance.

The Senate grants Julius Caesar the office of dictator for life, provoking extreme envy and a deadly conspiracy against him.

Augustus carefully cultivates the image of a modest republican citizen rather than a monarch, despite holding unprecedented political power.

Tiberius abruptly abandons his political career and retires to the island of Rhodes, infuriating Augustus.

Under Sejanus's growing influence, Tiberius begins arresting and persecuting Agrippina the Elder and her surviving sons.

Tiberius discovers Sejanus is plotting to seize the imperial title and has him arrested through a letter that first praises then condemns him.

Caligula wins immediate public support by loosening censorship, reducing taxes, and restoring elections after Tiberius's restrictive reign.

Claudius secures the army's loyalty by paying soldiers a cash bonus, becoming the first Caesar to buy military allegiance.

Claudius marries his own niece Agrippina the Younger and adopts her son Nero as his successor over his biological son Britannicus.

Nero has his stepbrother Britannicus murdered, then later divorces, exiles, and has his first wife Octavia killed.

Galba breaks his promise to name Otho his heir, prompting Otho to convince the praetorian guard to turn against Galba.

Vespasian decides to march on Rome and claim the imperial office only after receiving a letter from Otho pleading for vengeance against Vitellius.

Domitian dreams that his patron goddess Minerva can no longer protect him, foreshadowing his imminent assassination.

Suetonius's biographies are shaped by pivotal choices, discoveries, and reversals that determined the course of each Caesar's story. Julius Caesar's strategic use of family marriages and political alliances built his power base, but his acceptance of the dictatorship for life sealed his fate by provoking a deadly conspiracy. Augustus redefined the imperial office by performing republican modesty while accumulating absolute power, a precedent that later Caesars like Caligula and Domitian deliberately dismantled. Tiberius's reign turned on two crucial moments: his mysterious self-exile to Rhodes early in his career and his eventual betrayal of his own enforcer Sejanus, revealing how political paranoia consumed him. Claudius's decision to buy military loyalty with cash and to marry his own niece Agrippina set in motion the dynastic scheming that would ultimately put Nero on the throne. The final Flavian rulers were defined by a stark contrast between Vespasian, who acted only from a sense of duty, and Domitian, whose prophetic dream foretold the just end of his tyranny.