 Though the civil war had not ended at Pharsulus, the battle marked the pinnacle of Caesar's power and effectively ended the Republic.The battle gave Caesar a much needed boost in legitimacy, as prior to the battle much of the Roman world outside Italy supported Pompey and the Optimates as the legitimate government of Rome.After Pompey's defeat, most of the senate defected to Caesar, including many of the soldiers who had fought under Pompey.