The war against Antony and Cleopatra

I have always found the war Octavian fought against Antony and Cleopatra hard to understand. How did Antony find himself losing without even fighting a proper battle given all his experience as a general and commanding an army equal to or stronger than his opponent's? Barry Strauss explains the campaign brilliantly.
You can find his book The War that made the Roman Empire here. Highly recommended.