The rising dramatic action of the first scene in Act I leads the reader to see that the Triumvirs are actually going to turn into competitors rather than colleagues. Eventually, an armed conflict will take place between Antony and Octavius (Caesar). The prophecy of the Soothsayer is the clue to the reader of the eventual outcome.
The play opens with Philo, the voice of martial code of rome foreshadowing the fall of Antony. Philo comments on Antony's deterioration as a soldier because of his excessive desire for cleopatra, the queen of egypt. Philo explains how Antony has become "bellows & fans" to "cool a gypsy's lust". Therefore, Act 1 secne I froegrounds Antony's complete destruction & defeat as a soldier as a result of his preference of sexual desire for Cleopatra over his soldiership.