This league being formed, the three confederates turned their united force against the party of the conspirators. Of this party Brutus and Cassius were still at the head.
The scene of the contests between Octavius, Antony, and Lepidus had been chiefly Italy and the other central countries of Europe. Brutus and Cassius, on the other hand, had gone across the Adriatic Sea into the East immediately after Caesar's assassination. They were now in Asia Minor, and were employed in concentrating their forces, forming alliances with the various Eastern powers, raising troops, bringing over to their side the Roman legions which were stationed in that quarter of the world, seizing magazines, and exacting contributions from all who could be induced to favor their cause. Among other embassages which they sent, one went to Egypt to demand aid from Cleopatra. Cleopatra, however, was resolved to join the other side in the contest. It was natural that she should feel grateful to Caesar for his efforts and sacrifices in her behalf, and that she should be inclined to favor the cause of his friends. Accordingly, instead of sending troops to aid Brutus and Cassius, as they had desired her to do, she immediately fitted out an expedition to proceed to the coast of Asia, with a view of rendering all the aid in her power to Antony's cause.
Cassius, on his part, finding that Cleopatra was determined on joining his enemies, immediately resolved on proceeding at once to Egypt and taking possession of the country. He also stationed a military force at Taenarus, the southern promontory of Greece, to watch for and intercept the fleet of Cleopatra as soon as it should appear on the European shores. All these plans, however-both those which Cleopatra formed against Cassius, and those which Cassius formed against her-failed of accomplishment. Cleopatra's fleet encountered a terrible storm, which dispersed and destroyed it. A small remnant was driven upon the coast of Africa, but nothing could be saved which could be made available for the purpose intended. As for Cassius's intended expedition to Egypt, it was not carried into effect. The dangers which began now to threaten him from the direction of Italy and Rome were so imminent, that, at Brutus's urgent request, he gave up the Egyptian plan, and the two generals concentrated their forces to meet the armies of the triumvirate which were now rapidly advancing to attack them. They passed for this purpose across the Hellespont from Sestos to Abydos, and entered Thrace.
After various marches and countermarches, and a long succession of those maneuvers by which two powerful armies, approaching a contest, endeavor each to gain some position of advantage against the other, the various bodies of troops belonging, respectively, to the two powers, came into the vicinity of each other near Philippi. Brutus and Cassius arrived here first. There was a plain in the neighborhood of the city, with a rising ground in a certain portion of it. Brutus took possession of this elevation, and intrenched himself there. Cassius posted his forces about three miles distant, near the sea. There was a line of intrenchments between the two camps, which formed a chain of communication by which the positions of the two commanders were connected. The armies were thus very advantageously posted. They had the River Strymon and a marsh on the left of the ground that they occupied, while the plain was before them, and the sea behind. Here they awaited the arrival of their foes.
Antony, who was at this time at Amphipolis, a city not far distant from Philippi, learning that Brutus and Cassius had taken their positions in anticipation of an attack, advanced immediately and encamped upon the plain. Octavius was detained by sickness at the city of Dyrrachium, not very far distant. Antony waited for him. It was ten days before he came. At length he arrived, though in coming he had to be borne upon a litter, being still too sick to travel in any other way. Antony approached, and established his camp opposite to that of Cassius, near the sea, while Octavius took post opposite to Brutus. The four armies then paused, contemplating the probable results of the engagement that was about to ensue.
The forces on the two sides were nearly equal; but on the Republican side, that is, on the part of Brutus and Cassius, there was great inconvenience and suffering for want of a sufficient supply of provisions and stores. There was some difference of opinion between Brutus and Cassius in respect to what it was best for them to do. Brutus was inclined to give the enemy battle. Cassius was reluctant to do so, since, under the circumstances in which they were placed, he considered it unwise to hazard, as they necessarily must do, the whole success of their cause to the chances of a single battle. A council of war was convened, and the various officers were asked to give their opinions. In this conference, one of the officers having recommended to postpone the conflict to the next winter, Brutus asked him what advantage he hoped to attain by such delay. "If I gain nothing else," replied the officer, "I shall live so much the longer." This answer touched Cassius's pride and military sense of honor. Rather than concur in a counsel which was thus, on the part of one of its advocates at least, dictated by what he considered an inglorious love of life, he preferred to retract his opinion. It was agreed by the council that the army should maintain its ground and give the enemy battle. The officers then repaired to their respective camps.
Brutus was greatly pleased at this decision. To fight the battle had been his original desire, and as his counsels had prevailed, he was, of course, gratified with the prospect for the morrow. He arranged a sumptuous entertainment in his tent, and invited all the officers of his division of the army to sup with him. The party spent the night in convivial pleasures, and in mutual congratulations at the prospect of the victory which, as they believed, awaited them on the morrow. Brutus entertained his guests with brilliant conversation all the evening, and inspired them with his own confident anticipations of success in the conflict which was to ensue.
Cassius, on the other hand, in his camp by the sea, was silent and desponding. He supped privately with a few intimate friends. On rising from the table, he took one of his officers aside, and, pressing his hand, said to him that he felt great misgivings in respect to the result of the contest. "It is against my judgment," said he, "that we thus hazard the liberty of Rome on the event of one battle, fought under such circumstances as these. Whatever is the result, I wish you to bear me witness hereafter that I was forced into this measure by circumstances that I could not control. I suppose, however, that I ought to take courage, notwithstanding the reasons that I have for these gloomy forebodings. Let us, therefore, hope for the best; and come and sup with me again to-morrow night. To-morrow is my birth-day."