What-if: Julius Caesar Survives Assassination

Beware the Ides of March is one of the most well-known Shakespearean phrases that many remember to this day. Made famous in his play The Tragedy of Julius Caesar, the assassination of the great Roman leader more than two thousand years ago remains one of the most interesting historical events. It has been revisited in various forms for entertainment, but it has also been explored in the realm of alternative history. 

It’s hard not to think about how history could’ve been different if Julius Caesar had somehow survived those events. How would that have changed the story of Rome? Would he have conquered more lands, or even restored the republic to a kingship? 

Coming off the heels of my latest extended edition on Hannibal and his invasion of Rome, and after listening to an episode on this very topic via The Ancients, a podcast for ancient history fans, I decided to delve into it. But first, for those who might not know much about this event, let’s lay the foundation. 

What were the Ides of March? 

In the Roman calendar, the Ides referred to the middle of the month, usually the 13th, but in March, May, July, and October, it fell on the 15th. The Ides of March wasn’t inherently ominous; it was a day tied to religious observances and civic life. But in 44 BC, it became something far more significant: the day Julius Caesar was struck down in the Senate.

By early 44 BC, Caesar had accumulated unprecedented power. Named “dictator for life,” he blurred the line between republic and monarchy. For a minority of senators, this wasn’t reform; it was the death of the Republic. Fears of tyranny, resentment over lost influence, and a belief, however sincere, that they were saving Rome drove the conspirators to act.

Vincenzo Camuccini’s early 19th‑century history painting The Death of Julius Caesar depicts the dramatic moment of Caesar’s assassination in the Roman Senate, a scene that has inspired artists and historians alike. The original work dates from 1804–1805 and is based on the ancient accounts of Caesar’s murder on the Ides of March.

The assassination wasn’t the work of a single rival, but a coordinated effort by a group calling themselves Liberatores. Among the most prominent were Marcus Junius Brutus and Gaius Cassius Longinus, both of whom believed they were restoring liberty. Ironically, several conspirators had once been allies or beneficiaries of Caesar himself, with Brutus and Cassius slated to receive appointments from Caesar that they took up after his death. 

On the morning of March 15, Caesar, dealing with an illness, ignored warnings, both political and personal, as he was lured to a senate meeting at the Theatre of Pompey. There, surrounded by senators, the conspirators struck. Accounts vary, but he was stabbed over twenty times. Within moments, the most powerful man in Rome lay dead, and the Republic was thrown into chaos.

Alternate Timeline: If Caesar Had Lived

It’s hard not to wonder how differently history might have unfolded if Caesar had survived that day. A single decision, heeding a warning, delaying the meeting, or uncovering the plot, could have changed everything.

Had Caesar discovered the conspiracy, the response would likely have been swift and unforgiving. The ringleaders would be arrested, executed, or exiled, eliminating much of the remaining opposition in the Senate. Rather than restoring the Republic, the failed assassination might have accelerated its transformation into a centralized regime under Caesar. From there, his long-planned campaign against Parthia would likely move forward. 

The Planned Campaign Against Parthia

Parthia was more than just a distant kingdom on Rome’s eastern frontier. It was one of the most formidable empires of the ancient world. Situated in what is now northeastern Iran, Parthia had long resisted outside conquest. Its heavy cavalry and horse archers made it a nightmare for traditional Roman legions, and its victories over Crassus and earlier Roman forces were still fresh in memory. For Rome, Parthia represented both a strategic threat and an opportunity: controlling it would secure the eastern frontier, protect Rome’s allies, and open the door to influence over the trade-rich regions of Mesopotamia.

Caesar’s interest in Parthia was ambitious but calculated. Having already transformed Rome’s political landscape, he sought to expand its military and political influence to match his own unprecedented power. Conquering Parthia would not just be a military victory, but it would be a personal triumph that erased the humiliation of Crassus’s defeat at Carrhae and solidified Caesar as the unmatched master of Rome’s destiny. He reportedly envisioned a campaign that would take him through Armenia and into the heart of Parthian territory. 

Map showing the Parthian Empire from 44 BCE to 138 CE. Source: Farrokh, Shadows in the Desert: Ancient Persia at War (p. 155).

Beyond revenge or prestige, Caesar also saw the economic and political benefits. Parthia controlled key trade routes connecting the Mediterranean to the East, and subjugating it would allow Rome to tap into wealth, resources, and influence far beyond the Mediterranean basin. In essence, a successful Parthian campaign would have been the culmination of Caesar’s vision: uniting military glory, political dominance, and economic advantage under his leadership, while sending a clear message that he was not to be challenged.

And it may not have stopped there. Caesar had long admired Alexander the Great, and further eastern expansion is not out of the question. Whether ambition, logistics, or time would limit him is uncertain, but the possibility remains that Rome’s frontier could have stretched even farther.

A Looming Civil War?

 

Yet success abroad often breeds instability at home. While Caesar campaigned, Rome itself could once again become a battleground. Rival factions might rise in his absence, echoing the earlier conflicts between Lucius Cornelius Sulla and Gaius Marius. A renewed civil war could force Caesar to abandon his campaigns and return to restore order.

There’s also the question of how his story ends. If Caesar were to die in battle, Rome would face a crisis of succession. Without a stable transition of power, figures like Octavian and Mark Antony might still emerge, but under very different circumstances, and likely through another brutal conflict.

Even if Caesar lived and triumphed, one issue would remain unresolved: could Rome truly accept a king? The Republic’s deep-rooted resistance to monarchy wouldn’t simply disappear. Whether Caesar formally took the title or ruled in all but name, tension between tradition and reality would persist, and it might only be a matter of time before Rome faced yet another explosive reckoning. 

In such a situation, it might have meant that Caesar’s victory was temporary, for if Rome turned to infighting, protecting these new territorial gains would have been difficult. Perhaps in such a situation, the Parthia would once again become the next ruler’s right to rule by restoring Rome’s honor and reclaiming what Caesar had conquered.

Check out The Ancients podcast and their episode about this topic on Spotify.

Sources

1. Appian. (n.d.). The Civil Wars. (Translation and edition may vary).

2. Billows, R. A. (2011). Julius Caesar: The Colossus of Rome. Yale University Press.

3. Caesar, J. (n.d.). Commentarii de Bello Gallico [Commentaries on the Gallic War]. (Translation and edition may vary).

4. Dio, C. (n.d.). Roman History [History of Rome]. (Translation and edition may vary).

5. Goldsworthy, A. (2006). Caesar: Life of a Colossus. Yale University Press.

6. Grant, M. (1978). The History of Rome. Weidenfeld & Nicolson.

7. Plutarch. (n.d.). The Life of Julius Caesar [Parallel Lives]. (Translation and edition may vary).

IMAGES

1. Camuccini, V. (1771–1844). The Death of Julius Caesar [Detail of painting]. Wikimedia Commons. https://commons.wikimedia.org/wiki/File:Vincenzo_Camuccini,_The_Death_of_Julius_Caesar_(detail).jpg 

2. Royer, L. (1899). Vercingetorix throwing down his weapons at the feet of Julius Caesar [Painting]. Wikimedia Commons. https://commons.wikimedia.org/wiki/File:Lionel_Royer_-_Vercingetorix_Throwing_down_His_Weapons_at_the_feet_of_Julius_Caesar.jpg 

3. Farrokh, K. (2024). Map of the Parthian Empire in 44 BCE to 138 CE [Map]. In A synopsis of the Parthian Empire (247 BCE–224 CE). https://www.kavehfarrokh.com/sassanian-military-history/a-synopsis-of-the-parthian-empire-247-bce-224-ce/