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The assassination of Julius Caesar on 15 March 44 BC shocked Rome. The conspirators believed the Roman Republic would be restored. Instead, civil war followed, and the Roman Empire became firmly established.
In ancient Rome the Ides of March were part of a series of days of three grouped by the ancient Romans. The ides occurred on the fifteenth of March, May, July, and October and in other months started on the thirteenth day. Since the early Romans used a lunar calendar, sometimes the ides might be a time of foreboding and omens. However, since March was the beginning of the new year on the old Roman calendar, there were festivals to welcome the new year. On this Ide, Jupiter (Greek Zeus) and other deities were being honored. However, this time of festivity in March would be forever changed by the assassination of Julius Caesar.
Caesar had created enemies over his actions. He defied the senate in 49 BC by crossing the Rubicon without disbanding his army sparking a civil war he decisively won. He assumed the office of dictatorship at first just annually then for life. While he did many noteworthy things such as providing land for veterans and overseeing the creation of a new calendar (the Julian), his centralization of power undermined republican institutions. Proclaiming himself perpetual dictator and accepting king like honors upset many in the senate. The leaders of the plot to kill him were Marcus Juinius Brutus and Gaius Cassius, but sixty senators in total were in support.
According to Plutarch, Caesar was warned of his death by a soothsayer. Shakespeare in his famous play Julius Caesarused this by having his soothsayer utter: “beware the ides of March.” Caesar went to attend a meeting of senators at the Curia of Pompey within the Theatre of Pompey in Rome. After he entered, he was ambushed. Marc Antony, who was going to enter behind him, was delayed by another conspirator and thus was not there to prevent the assassination. One of the first attackers only wounder Caesar, who took the knife and stabbed him. However, the other attackers thrust their daggers into him stabbing 23 times though not all wounding him. He would end dying under the Pompey statue. His last words are disputed, but Suetonious reports he said to Brutus “You to, child?” Shakespeare rewrote that into the famous “Et tu, Brute.”
Rome was stunned by the assassination. The conspirators thought they would he hailed as heroes for killing the tyrant Caesar. Instead, they were treated coldly, and few places would let them in. Caesar’s body would be taken home by his slaves where it was prepared for funeral. At the funeral, Marc Antony gave a eulogy that stirred the people against Brutus and the other conspirators. Caesar’s death created a power vacuum in Rome and various factions now jostled for power. Brutus and Cassius fled, each to different places to recruit supporters for the coming confrontation. Gaius Octavius, Caesar’s 18-year-old grand-nephew and designated heir under the will, came into conflict with Marc Antony over who was to rule.
Aftermath
Civil war between Octavius and Antony gave both Brutus and Cassius the opportunity to attack Rome. However, both Octavius and Antony made peace and turned their full armies against them. At the Battle of Phillippi on 3 October 42 BC, Brutus defeated Octavius forces, but Antony defeated Cassius. Cassius, assuming Brutus was dead, killed himself. The second battle on 23 October resulted in Brutus’ defeat and him fleeing to the hills where he killed himself. Antony treated his body with respect wrapping in expensive purple mantle. However, Octavius had his head cut off to be taken and displayed in Rome. It would never arrive as the box it was in fell into the Mediterranean Sea during a storm on the way to Rome. His body was cremated and remains sent to his mother. None of the other conspirators would survive. Senators who had participated, knew of the plot, and others who had assisted, were tracked down and executed. While some were able to flee to distant lands, they were eventually tracked down and killed, sometimes by bounty hunters.
Instead of restoring the republic, the assassination achieved the opposite. Rome became an empire with power centralized into one person and the offices that answered to him. The Senate would continue to exist to pass laws but could not overrule him. The Praetorian Guard was created to protect an emperor from being assassinated. The Roman Empire expanded and the entire Mediterranean came under Roman rule. Rome became not just a city, but the name for the world that was ruled by it.
Sources
“The Assassination of Julius Caesar (44 BC): Causes, Conspirators, and Consequences – History Rome.” SolarAndalucia, January 18, 2026. https://history-rome.com/the-assassination-of-julius-caesar-44-bc-causes-conspirators-and-consequences/.
Klein, Christopher. “Julius Caesar’s Assassination: Fall of the Roman Republic | HISTORY.” HISTORY. Last modified March 4, 2026. https://www.history.com/articles/julius-caesar-assassination-fall-roman-republic.
Toynbee, Arnold Joseph. “Julius Caesar.” Encyclopedia Britannica. Last modified March 6, 2026. https://www.britannica.com/biography/Julius-Caesar-Roman-ruler.
Videos
Historia Civilis. “The Assassination of Julius Caesar (the Ides of March, 44 B.C.E.).” Video. YouTube, October 19, 2019. https://www.youtube.com/watch?v=9XBxMk_plhA.
History Unleashed. “How The Senators Who Stabbed Julius Caesar Died | Rome’s Revenge.” Video. YouTube, January 10, 2026. https://www.youtube.com/watch?v=up6zZ3tgNio.
Arik Elman. “Charlton Heston Mark Antony Speech ‘Julius Caesar’ (1970).” Video. YouTube, February 25, 2013. https://www.youtube.com/watch?v=0bi1PvXCbr8.


