Answer:
Anthony’s defeat shows that Ceasar’s ability to guarantee political success was weakened.
Step-by-step explanation:
Under the command of Ceasaar, Anthony is defeated in the battle and Actium, by Octavian. This episode weakens Ceasar's leadership and causes him to lose his ability to protect and promote Rome's political success, as he knows that his authority will be questioned, as it was, when Octavian launched the attack that destroyed the Roman empire.