The Final War of the Roman Republic, also know as Antony's civil war or the War between Antony and Octavian, is the last and probably most important of the Roman civil wars of the republic, fought between Cleopatra (assisted by Mark Antony) and Octavian.

After the Roman Senate declares war on the Egyptian queen Cleopatra, Antony, her lover and ally, betrays Rome and joins the war on Cleopatra’s side.

After the decisive victory for Octavian at the Battle of Actium, Cleopatra and Antony withdraw to Alexandria, where Octavian besieges the city until both Antony and Cleopatra commit suicide.Following the end of the war, Octavian brings peace to the Roman state that has been plagued by a century of civil wars.

Octavian becomes the most powerful man in the Roman world and the Senate will bestow upon him the name of Augustus in 27 BCE.

Octavian, now Augustus, will be the first Roman Emperor and will transform the oligarchic/democratic Republic into the autocratic Roman Empire.The last Republican Civil War marks the beginning of the Pax Romana, the longest period of peace and stability that Europe has seen to date.