He was the most powerful man in the Rome

At the time, Julius Caesar was the most powerful man in Rome. He terminated the Roman Republic by having the Senate declare him the dictator of Rome. Marcus Antonious, his cousin, became his right-hand man after his death. Marcus Aemilius Lepidus, Caesar's buddy, and Caesar's nephew, Gaius Octavius Thurinus. They lied in order to defeat Brutus and Cassius' army in the Battle of Philippi in 42 BCE. Antony and Octavian assassinated Caesar's buddy Lepidus (Had an agreement of territory.) They lost the Battle of Actium in 31 BCE after Anthony married a lady. As a result, they both committed suicide. The Senate then bestowed additional extraordinary powers to Octavian, who assumed the name Augustus and became Rome's first emperor.

Pompey allied himself with the Rome senate and resisted Caesar when the First Triumvirate ended with Crassus' death in 53 BC. This sparked the Great Rome Civil War (49–45 BC), in which Caesar eventually beat Pompey and his Senate supporters to become Rome's unchallenged ruler. A dictator was a position in the Rome Republic that was given broad powers, usually in times of emergency. Caesar became dictator for the first time in 49 BC. Caesar was named dictator perpetuo in 44 BC, after crushing the remaining opposition of Pompey's allies (dictator in perpetuity). He also held tribunician power indefinitely, preventing the other tribunes from interfering with his acts.