The Destiny of Rome
Ten years later, the supreme strategist Octavian waged the naval battle of Actium against his former ally, who now had the backing of Cleopatra. Octavian put an end to Antony and Cleopatra's military ambitions and became the first Roman emperor under the name of Augustus. Witness the last moments of the Roman Republic, marked by this terrible duel between two men hungry for glory.
Starring
Watch "The Destiny of Rome" on Tubi TV released in 2011. It's a documentary movie, and has a rating of 7.1 out of 10 from Imdb which is usually fine for this kind of movie, and is currently available to watch for free.