Why was there a civil war again after Julius Caesar’s death?

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Explanation:

Caesar's Civil War resulted from the long political subversion of the Roman Government's institutions, which began with the career of Tiberius Gracchus, continuing with the Marian reforms of the legions, the bloody dictatorship of Lucius Cornelius Sulla, and completed by the First Triumvirate over Rome.

Explanation:

Caesar's Civil War (49–45 BC) was one of the last politico-military conflicts in the Roman Republic before the establishment of the Roman Empire. It began as a series of political and military confrontations, between Julius Caesar (100–44 BC), his political supporters (broadly known as Populares), and his legions, against the Optimates (or Boni), the politically conservative and socially traditionalist faction of the Roman Senate,[3] who were supported by Pompey (106–48 BC) and his legions.[4]

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