The plebeian tribunes (the representatives of the plebeians) and the Plebeian Council (the assembly of the plebeians) at times clashed with the Senate over the mentioned reforms and over the power relationship between the plebeian institutions and the Senate. The Optimates among the senators spearheaded the senatorial opposition. These tribunes were supported by Populares politicians such as Gaius Marius and Julius Caesar, who were often patricians, or equites. Their conflicts also played a part in some of the civil wars of the Late Roman Republic: Sulla's first civil war (88–87 BC), Sulla's second civil war (82–81 BC), the Sertorian War (83–72 BC), Lepidus' rebellion (77 BC), Caesar's Civil War (49–45 BC), the post-Caesarian civil war (44–43 BC), the Liberators' civil war (44–42 BC) and the Sicilian revolt (44–36 BC).