Antony felt he could best regain lost ground by military victory. Decius (Decimus Brutus) was in control of Cisalpine Gaul and he was the closest of the conspirators. Antony turned against him, despite the senatorial amnesty of the conspirators, and thus began a new civil war.

As soon as Antony had marched out of Rome at the head of his troops, however, Octavius persuaded the Senate to declare him a public enemy. With senatorial backing gone, Mark Antony could not make head against Decius, but was forced, in April 43 b.c. (a full year after the assassination), to march his army into Gaul. He had failed militarily as well as politically.

Octavius, master of Rome, now forced the Senate to recognize him at last as heir to Caesar. In September 43 b.c. he himself led an army against Decius. Octavius was no fighter, but the name of Caesar succeeded where Antony had failed. Decius' soldiers deserted in droves, and Decius himself had to flee. He was captured and executed and Octavius' reputation skyrocketed.

By that time, though, Brutus and Cassius had consolidated their power over the eastern half of the Roman realm. It was clear that if Antony and Octavius continued to maneuver against each other, they would both lose and the conspirators would yet emerge in control.

Lepidus therefore labored to bring Antony and Octavius together in a compromise settlement, and succeeded. All three met in Bononia (the modern Bologna) on November 27, 43 b.c., twenty months after the assassination.

The three agreed to combine in a three-man government, an agreement resembling the one that had been made by Caesar, Pompey, and Crassus seventeen years before. In fact, the new agreement is called the Second Triumvirate. The fourth act opens after the Second Triumvirate has been formed.

Shakespeare presents the Triumvirate at the moment they make a grisly bargain to seal their compact.

What they chiefly need, after all, is money. One way of obtaining it is to declare certain well-to-do Individuals guilty of treason, execute them, and confiscate their estates. This also gives each triumvir a chance to get rid of personal enemies as well. The enemy of one, however, might be the friend or relative of another member of the Triumvirate; and if one of them sacrifices a friend or relative he would naturally expect the other two to make a similar sacrifice.

The proscriptions (that is, arbitrary condemnations) include, for instance, Lepidus' brother. As quid pro quo, Antony must allow his nephew to be marked with a prick in the wax (see page I-290), indicating he is listed for execution. Antony says, with a kind of gruesome magnanimity:

—Act IV, scene i, line 6

What Mark Antony demands (something that does not appear in the play at this point) and Octavius is forced to concede, is Cicero's life. Cicero had labored for Octavius and had made all the difference when the young man had first come to Rome as an almost ignored young man, and now Octavius, grown to power, delivers the great orator to his enemy. However much we might excuse it as practical politics, however much we might argue that Octavius had no choice, it remains the blackest single act of Octavius' long and illustrious career.

With the immediate financial problem ironed out by means of the proscriptions, the Triumvirate can turn to military matters. Antony says:

—Act IV, scene i, lines 40-42

The united Caesarians must face the united conspirators. Brutus had been in Macedonia for a year now and Cassius in Syria. In the face of the gathering of their enemies, they were getting armies ready for battle and planning to unite their forces.

At once the action moves to the conspirators, who are meeting each other in Asia Minor, and for the first tune the setting of the play is outside the city of Rome.

The scene is laid in the camp of Brutus' army outside Sardis, and one of Brutus' aides, Lucilius, tells him with reference to Cassius' approaching army:

—Act IV, scene ii, line 28

Sardis is a city in western Asia Minor, forty-five miles east of the Aegean Sea. In ancient times it was the capital of the Lydian monarchy, which reached its height under Croesus, who reigned there from 560 to 546 b.c. The wealth of Sardis and the kingdom of Lydia at that time was such that the Greeks used to say "as rich as Croesus," a phrase that is still used today.

It was captured by the Persians in 546 b.c. Then when Alexander the Great destroyed the Persian Empire two centuries later, Sardis fell under the rule of Macedonian generals and monarchs.

In 133 b.c. it became Roman and continued to remain a great city for over a thousand years more. It was finally destroyed in 1402 by the hosts of Tamerlane, the Mongol conqueror, and has lain in ruins ever since.

Once Brutus and Cassius meet in the former's tent, they have at each other, for both have accumulated grievances. Brutus scorns Cassius for his avarice:

—Act IV, scene iii, lines 9-12

The difficulty with the conspirators, as much as with the Triumvirate, is money. Soldiers must be paid or they will desert, and the money must be obtained. Cassius therefore sold appointments to high positions for ready cash, and it is this Brutus scorns.

Another source of money was from the surrounding population. The helpless civilians had no way of resisting the armies, and during the early part of 42 b.c., for instance, Cassius stripped the island of Rhodes of all its precious metals. Asia Minor felt the squeeze too. Wherever Cassius' army passed, the natives were stripped bare and, in some cases, killed when they had given the last drachma. Brutus scorns this too, for he says:

—Act IV, scene iii, lines 71-75

This sounds good, but in the course of the Pompeian war, Brutus, as an actual historical character, had spent some time on the island of Cyprus. There he had oppressed the provincials heartlessly, squeezing money out of them without pity, and writing complaining letters that he was prevented from squeezing still more out of them by other officials.