The only reason Brutus joined Cassius and the conspirators, was because Cassius used tactics like; flattering Brutus, writing letter in different handwriting from “concerned romans” about how Caesar must go, and by convincing Brutus that Caesar was weak, and would corrupt Rome. Because Brutus believed wholeheartedly that Caesar was indeed bad for Rome, he joined in on the plot to kill him.
Brutus’s betrayal against Caesar infuriated Antony. In fact, it upset him so much that Antony and the rest of the triumvirates, Octavius and Lepidus, went to war against the conspirators. Brutus was confident