In the mid-1st century BC, Roman politics were restless.
Political divisions in Rome became identified with two groupings, populares (who hoped for the support of the people) and optimates (the "best", who wanted to maintain exclusive aristocratic control).
Sulla overthrew all populist leaders and his constitutional reforms removed powers (such as those of the tribune of the plebs) that had supported populist approaches.
Meanwhile, social and economic stresses continued to build; Rome had become a metropolis with a super-rich aristocracy, debt-ridden aspirants, and a large proletariat often of impoverished farmers.
The latter groups supported the Catilinarian conspiracy—a resounding failure, since the consul Marcus Tullius Cicero quickly arrested and executed the main leaders of the conspiracy.

Onto this turbulent scene emerged Gaius Julius Caesar, from an aristocratic family of limited wealth.
His aunt Julia was Marius' wife, and Caesar identified with the populares.
To achieve power, Caesar reconciled the two most powerful men in Rome: Marcus Licinius Crassus, who had financed much of his earlier career, and Crassus' rival, Gnaeus Pompeius Magnus (anglicized as Pompey), to whom he married his daughter.
He formed them into a new informal alliance including himself, the First Triumvirate ("three men").
This satisfied the interests of all three: Crassus, the richest man in Rome, became richer and ultimately achieved high military command; Pompey exerted more influence in the Senate; and Caesar obtained the consulship and military command in Gaul.
So long as they could agree, the three were in effect the rulers of Rome.

In 54 BC, Caesar's daughter, Pompey's wife, died in childbirth, unraveling one link in the alliance.
In 53 BC, Crassus invaded Parthia and was killed in the Battle of Carrhae.
The Triumvirate disintegrated at Crassus' death.
Crassus had acted as mediator between Caesar and Pompey, and, without him, the two generals manoeuvred against each other for power.
Caesar conquered Gaul, obtaining immense wealth, respect in Rome and the loyalty of battle-hardened legions.
He also became a clear menace to Pompey and was loathed by many optimates.
Confident that Caesar could be stopped by legal means, Pompey's party tried to strip Caesar of his legions, a prelude to Caesar's trial, impoverishment, and exile.

To avoid this fate, Caesar crossed the Rubicon River and invaded Rome in 49 BC.
Pompey and his party fled from Italy, pursued by Caesar.
The Battle of Pharsalus was a brilliant victory for Caesar and in this and other campaigns he destroyed all of the optimates' leaders: Metellus Scipio, Cato the Younger, and Pompey's son, Gnaeus Pompeius.
Pompey was murdered in Egypt in 48 BC.
Caesar was now pre-eminent over Rome, attracting the bitter enmity of many aristocrats.
He was granted many offices and honours.
In just five years, he held four consulships, two ordinary dictatorships, and two special dictatorships: one for ten years and another for perpetuity.
He was murdered in 44 BC, on the Ides of March by the Liberatores.
In the mid-1st century BC, Roman politics were restless. Political divisions in Rome became identified with two groupings, populares (who hoped for the support of the people) and optimates (the "best", who wanted to maintain exclusive aristocratic control). Sulla overthrew all populist leaders and his constitutional reforms removed powers (such as those of the tribune of the plebs) that had supported populist approaches. Meanwhile, social and economic stresses continued to build; Rome had become a metropolis with a super-rich aristocracy, debt-ridden aspirants, and a large proletariat often of impoverished farmers. The latter groups supported the Catilinarian conspiracy—a resounding failure, since the consul Marcus Tullius Cicero quickly arrested and executed the main leaders of the conspiracy.
Onto this turbulent scene emerged Gaius Julius Caesar, from an aristocratic family of limited wealth. His aunt Julia was Marius' wife, and Caesar identified with the populares. To achieve power, Caesar reconciled the two most powerful men in Rome: Marcus Licinius Crassus, who had financed much of his earlier career, and Crassus' rival, Gnaeus Pompeius Magnus (anglicized as Pompey), to whom he married his daughter. He formed them into a new informal alliance including himself, the First Triumvirate ("three men"). This satisfied the interests of all three: Crassus, the richest man in Rome, became richer and ultimately achieved high military command; Pompey exerted more influence in the Senate; and Caesar obtained the consulship and military command in Gaul. So long as they could agree, the three were in effect the rulers of Rome.
In 54 BC, Caesar's daughter, Pompey's wife, died in childbirth, unraveling one link in the alliance. In 53 BC, Crassus invaded Parthia and was killed in the Battle of Carrhae. The Triumvirate disintegrated at Crassus' death. Crassus had acted as mediator between Caesar and Pompey, and, without him, the two generals manoeuvred against each other for power. Caesar conquered Gaul, obtaining immense wealth, respect in Rome and the loyalty of battle-hardened legions. He also became a clear menace to Pompey and was loathed by many optimates. Confident that Caesar could be stopped by legal means, Pompey's party tried to strip Caesar of his legions, a prelude to Caesar's trial, impoverishment, and exile.
To avoid this fate, Caesar crossed the Rubicon River and invaded Rome in 49 BC. Pompey and his party fled from Italy, pursued by Caesar. The Battle of Pharsalus was a brilliant victory for Caesar and in this and other campaigns he destroyed all of the optimates' leaders: Metellus Scipio, Cato the Younger, and Pompey's son, Gnaeus Pompeius. Pompey was murdered in Egypt in 48 BC. Caesar was now pre-eminent over Rome, attracting the bitter enmity of many aristocrats. He was granted many offices and honours. In just five years, he held four consulships, two ordinary dictatorships, and two special dictatorships: one for ten years and another for perpetuity. He was murdered in 44 BC, on the Ides of March by the Liberatores.
Ancient Rome