Final answer:
Caesar's assassination was precipitated by his addition of Gauls to the Roman Senate, implementation of term limits for governors reducing Senate power, and his perceived indefinite dictatorship. These actions led Roman senators to fear the erosion of their power and traditional Roman values, ultimately resulting in his assassination in 44 BCE.
Step-by-step explanation:
The assassination of Julius Caesar by the senators was a culmination of a series of events that irritated the Roman elite, especially the optimates in the Senate. One major factor was Caesar's decision to add Gauls as senators, such as after the conquest of Gaul and distribution of rewards to his supporters.
This act deeply upset the Roman senators who saw it as an erosion of their aristocratic privilege and a dilution of Roman traditional values. Another aggravating action was Caesar's law imposing term limits on governors, which decreased the Senate's power significantly.
Moreover, Caesar's continual accumulation of power, particularly in his role as a dictator appointed for an indefinite period and eventually for life, was seen as a threat to the Republic. The senators feared he was becoming too powerful and might establish a tyranny.
This tension, fueled by Caesar's earlier actions such as waging war without the Senate's approval and the fear of losing their long-held aristocratic privileges, led to his assassination in 44 BCE by a group of senators including Brutus and Cassius.