Octavius Caesar eventually received the title too, and since control of the army was, at bottom, the secret of the control of the Roman state, his position as "Roman Imperator" was crucial. Through distortion we know the title as "Roman Emperor," and the state became the "Roman Empire."
Enobarbus uses the term "emperor" in its less exalted but more accurate aspect as "commander." Both Octavius Caesar and Mark Antony are referred to now and then throughout the play as "emperor."
... darting Parthia...
While Sextus Pompeius is being alcoholically neutralized in the West, Parthia is being defeated outright in the East. Leaving Antony in Italy, Ventidius sailed to Asia Minor, where in 39 b.c. he drove the Roman renegade Labienus into the eastern mountains and there defeated and killed him.
The Parthian army, under Pacorus, the son of King Orodes, still occupied Syria and Judea, however. In 38 b.c. Ventidius took his army to Syria and defeated the Parthians in three separate battles (and it was only after this was done that Herod could take his throne in Jerusalem).
In the last of the three victories over Parthia, Pacorus himself was slain. That last battle was fought (according to the story) on the fifteenth anniversary of the fateful day on which Crassus had lost his army at the Battle of Carrhae.
The third act opens, then, a year after the gay celebration at Misenum, with Ventidius returning in triumph from these wars. The dead body of the Parthian prince is being carried along with the army and Ventidius says:
Now, darting Parthia, art thou struck; and now
Pleased fortune does of Marcus Crassus' death
Make me revenger. Bear the King's son's body
Before our army. Thy Pacorus, Orodes,
Pays this for Marcus Crassus.
- Act III, scene i, lines 1-5
Parthia is called "darting" because of its reliance on archers in its battles. The Parthian arrows were their most effective weapon.
... Media, Mesopotamia...
Ventidius' aide, Silius, eagerly urges the general to pursue the enemy, to follow up the victory crushingly, and put an end to the Parthian menace forever. He says:
Spur through Media,
Mesopotamia, and the shelters whither
The routed fly.
- Act III, scene i, lines 7-9
Mesopotamia ("between the rivers") is the name given by the Greeks to the upper portion of the Tigris-Euphrates valley. It was the area within which Crassus had fought and died. The Romans struggled to grasp and hold it for centuries after Crassus' time, and from time to time succeeded. Nearly seven centuries went by before the region passed definitively out of their hands.
Media lay immediately to the east of Mesopotamia. It had been controlled by the Persians, conquered by Alexander the Great, and ruled by the early Seleucids, but at no time, then or later, could Roman force extend itself so far.
I have done enough...
Ventidius resists the temptation to continue the war. He might argue that a limited victory is safest. History is full of generals who could have gained greatly through initial victories and then went on to grasp for too much and to lose all. Adolf Hitler of Germany is only the latest example of this.
There have been exceptions, of course; Alexander the Great being the most notorious. It is hard to say how many generals have been lured to destruction by the specter of Alexander and by the fact that they themselves were not the military genius he was.
Ventidius does not advance such reasonable military grounds. He prefers instead to answer with the wisdom of the practical politician.
O Silius, Silius
I have done enough: a lower place, note well,
May make too great an act. For learn this, Silius,
Better to leave undone, than by our deed
Acquire too high a fame when him we serve's away.
- Act III, scene i, lines 11-15
Perhaps this is true in Antony's case, and if so it is another weakness of his. Since military valor was Antony's great recommendation, he could not endure having his subordinates display too much of it, lest people decide they can do without Antony.
Octavius Caesar had no difficulty of this sort. He was no military man, but he was a political genius. His generals could cover themselves with glory in his name for all he, or anyone, would care-as long as they followed his orders and left the political machinations to him.
... to Athens ...
As the Parthian menace is ended, at least temporarily, in victory, so the difficulties with Sextus Pompeius are ended, at least temporarily, in compromise. The quadrumvirs are separating and Mark Antony must go east again to look after his affairs. But still