From patrician family to pontifex maximus
Caesar was born in Rome in 100 BC to the patrician Julia family and rose through the standard sequence of Roman offices, from military tribune and quaestor to the more senior praetorship, winning election as pontifex maximus, Rome’s chief religious office, in 63 BC. From 58 to 51 BC he led Roman forces in the conquest of Gaul, fighting migrating tribes, Germanic forces and, at the siege of Alesia in 52 BC, the allied Gallic leader Vercingetorix. Political rupture with his former ally Pompey and the Senate led him to cross the Rubicon river into Italy with his army in January 49 BC, starting a civil war he won decisively at Pharsalus in 48 BC. He was made dictator, reformed the calendar, and was assassinated by a group of senators in Rome on 15 March 44 BC, aged fifty-five.
Caesar’s own war reports
Caesar’s own account of the Gallic Wars, written and circulated during the campaigns themselves, is treated by historians as almost the only surviving narrative of what happened there, despite being an openly interested document written to keep Caesar’s standing high in Rome while he was away from the city. His defeats are minimised and his victories emphasised throughout. Later biographers, chiefly Plutarch and Suetonius, wrote roughly a century and a half after his death and supply the personal anecdotes, his response on crossing the Rubicon, the circumstances of the assassination, that dominate popular memory of him, though modern historians treat some of their more dramatic details as likely embellished. Cicero’s surviving letters and speeches, written by a contemporary hostile to Caesar’s methods, offer a rare independent check on the political record.
The Rubicon and what came after
Trust between Caesar and Pompey broke down over several years as conservative senators, led by Cato, pushed to strip Caesar of his military command once his term as governor of Gaul ended, which would have exposed him to prosecution as a private citizen. Faced with the Senate’s ultimate decree authorising force against him, Caesar led a single legion across the Rubicon into Italy in January 49 BC, a step ancient writers record him marking with a line from the Greek playwright Menander about the die being cast. Pompey abandoned Italy for Greece rather than fight there, and Caesar spent the following years defeating Pompeian forces in Spain, Greece, Egypt and North Africa before returning to Rome as its unchallenged military and political master by 45 BC.
Was prosecution really the threat he claimed
Historians disagree over how real the threat of prosecution actually was if Caesar had given up his command as the Senate demanded, some argue a successful case against him was always unlikely, which would mean his stated justification for civil war was closer to pretext than necessity, while others treat the threat as genuine given the political forces arrayed against him. There is similar disagreement about what Caesar wanted most when he crossed the Rubicon: avoiding trial, securing a second consulship, winning a formal triumph, or protecting the powers of the tribunate, an office whose authority he himself later overrode when he needed treasury funds. The nature of the so-called First Triumvirate, his earlier informal alliance with Pompey and Crassus, is also now generally described by historians as a loose arrangement rather than any formal constitutional body.
A dictatorship, a knife, and no republic afterward
Caesar used his dictatorship to reform the Roman calendar, resettle veterans, expand the Senate and extend citizenship to some provincial communities, while also reducing the free grain distribution that had swollen under earlier populist politicians. Fear that these powers, formalised in early 44 BC as a lifetime dictatorship, amounted to monarchy in fact if not in name drove a group of roughly sixty senators to assassinate him at a Senate meeting held in the Theatre of Pompey. His death did not restore the Republic; it instead triggered a fresh round of civil wars, from which his adopted heir Octavian emerged victorious over the conspirators and then over Caesar’s former ally Mark Antony, taking the name Augustus and becoming Rome’s first emperor thirteen years later.
A life worth reading against its own sources
Caesar’s career is unusually well documented for the ancient world, but a large share of that documentation was written by Caesar himself for political effect, which makes him a good subject for readers interested in how historical figures shape their own record rather than simply appearing in it. The civil war and assassination are dramatic enough to sustain interest on plot alone, but the more durable value is in watching how thin the line runs between the war commentaries as evidence and the war commentaries as propaganda, and in the ongoing argument among historians about motives that Caesar never spelled out plainly himself. It rewards reading his own words alongside, rather than instead of, later and more critical accounts.