What led most directly to Julius cessation taking power?

Julius Caesar's rise to power was primarily driven by his military successes, particularly in Gaul, which garnered him significant popularity and loyalty among his troops. Additionally, the political turmoil and infighting within the Roman Republic, including the weakening of the Senate's authority and the conflict between the Optimates and Populares factions, created an environment conducive to his ascent. His crossing of the Rubicon River in 49 BCE marked a point of no return, igniting a civil war that ultimately led to his Dictatorship.