As a matter of fact, the old governmental methods of the Republic were adapted only to the conditions of a city community with a homogeneous population. There had been a breakdown years before Cæsar’s time, and the question now was who should benefit from this chaotic situation. The senators meant to get Cæsar out of Gaul, reduce him to the ranks of a private individual, and then ruin him by some legal prosecution in connection with his eight years of provincial rule. The chief asset of the Senate was Pompeius’ jealousy of Cæsar as a rival of his military glory; he was soured because he could not get the position and the influence for which his early record had marked him out. Pompeius was proconsul of Spain, according to the arrangement made at the last meeting of the triumvirs. It was only carried out nominally; he had no intention of losing his control of Rome, a control which depended on his presence at the center of affairs. Contrary to all precedent, he governed his province by means of deputies. He was also in special charge of the corn supply, a position valuable as a means of propitiating the people with votes. He arranged to have a five-year extension of his proconsular power in Spain, and his influence on the Senate is shown by their willingness to allot him 100 talents a year for the maintenance of his troops. He used his patronage exclusively to advance his own personal interests, oblivious of the compact with Cæsar, showing altogether that, while he meant to stand outside the law, the chicanery of legislation could well be used to block the path of his rival.
Cæsar, who had not forgotten to retain the favor of the Roman populace by entertainments and benefactions, and who had all the skill of a party boss in retaining the allegiance of friends and followers, had three very strong allies back of him, leaving aside his natural superiority in capacity and in shrewdness to Pompeius. His conquest of Gaul, followed as it was by a very judicious treatment of the conquered tribes, gave him the support of a warlike population ready to act on his behalf. Moreover, the reduction of the country had unlocked a store of wealth, which was naturally in his hands; the slaves alone, collected from the captives, represented as capital a very large sum of money. Then there were the seasoned legions on whose loyalty he could depend.
The rival claims of the two leaders reached an acute stage when Pompeius, now Consul, passed legislation by which an interval of five years was required between service as a provincial governor and as a magistrate in Rome. Cæsar’s term of office expired in B.C. 49; he had received leave to stand for the consulship and had requested to be left in possession of his provinces till the end of 49. Now in Pompeius’ legislation there was required, unless special permission were given, personal candidature, and also the Senate was given authority to relieve provincial governors at any time during the last year of their service. Cæsar might find himself relieved of his proconsulship before he had been elected Consul. It would be a dangerous position for him to confront a rival armed with extraordinary powers, while he was only an individual citizen. There were further grounds of irritation because the senatorial party refused to recognize certain administrative acts of Cæsar, by which he had extended the franchise to various provincial towns. In arranging the question of provincial succession there was much delay. Pompeius hesitated to accept the Senate’s drastic measure, by which Cæsar would be relieved long before he could be elected Consul. He made a show of conciliation by shortening the interval and also by promising to resign his own command before the expiration of his term if the Senate so desired. Cæsar’s agent in Rome, the Tribune Curio, displayed much ingenuity in obstructing all measures aimed at his chief, and it was plain from the way the political game was being played that Cæsar’s minimum, service as Proconsul till the end of 49, and entrance into the consulship on January 1, 48, would be the watchword of his partisans. In all other respects he showed himself ready for conciliation and compromise. When two legions were asked for the Parthian war, they were promptly sent, and no protest was made at their being kept at Capua, when they were no longer wanted in the East. Curio, too, was ordered to cease blocking the vote of money to pay Pompeius’ troops.
But the senatorial party were not ready to make terms; it seemed to them that with the co-operation of Pompeius they could place Cæsar in an impasse. They miscalculated his personal popularity and his military strength, and now were all the more confident, because they were successfully intriguing with Labienus to detach him from his chief.
The weakness of the senatorial clique was its obvious insincerity in claiming to be the representative of the party of law and order. It was absurd to object to Cæsar stepping directly from the proconsulship to the consulship as an irregularity, when Pompeius had held both offices together; indeed he had been twice Consul within four years, entirely in contravention of the required legal interval of ten years between the holding by one individual of the highest magistracy.
Marcellus, one of the Consuls in B.C. 51, a determined opponent of Cæsar, brought matters to a climax by denouncing Cæsar in the Senate as a brigand and asking that he should be called a public enemy unless he gave up his province by a fixed date. These motions were made as a result of the debate whether a successor to Cæsar should be appointed; they were carried by an imposing majority. An equal majority rejected the motion that Pompeius should be required to resign.
Curio, who had as Tribune interposed his veto on the first motion, then offered a resolution by which both commanders should be required to resign. This was carried by 322 to 320, but no effect was given to it; probably it was vetoed by a Pompeian Tribune. Through private channels, efforts were being made to prevent a break between the two rivals; on account of Pompeius’ well-known indecision of temper, the senatorial clique resolved by a bold stroke to prevent further negotiations. Marcellus, on the 9th of December, using as a pretext the rumor that Cæsar was on his way to Rome with his army, tried in vain to get the Senate to declare Cæsar a public enemy and to authorize Pompeius to take command of the troops in Italy and protect the state. Indignant at the timidity of the senators, he took matters in his own hands, virtually declaring war on his own responsibility, for he handed over the two Italian legions to Pompeius, with the command to march against Cæsar. Pompeius, though this action of the Consul was unconstitutional, accepted the commission; at the end of the month he was still confident that Cæsar would drop his claim to the consulship and that so peace would be restored.
Cæsar acted cautiously; he sent for additional troops from Gaul and also despatched a message to the Senate offering to resign all his provinces and his army, provided Pompeius would do the same. In case of refusal, he said he would be compelled to take measures for asserting his own rights and the freedom of the Roman people. Curio was sent with this ultimatum to Rome; it was only with difficulty that the letter was read. A motion was passed that at a fixed date Cæsar should give up his army and that his non-compliance would be treated as an act of war. There was, of course, the usual obstruction from Marcus Antonius, a Cæsarian Tribune; the final decree by which martial law was introduced and the magistrates called upon to see “that the commonwealth took no harm,” was not passed till the seventh of January. (49 B.C.) Lentulus, the Consul, in the meantime had advised the obstructing tribunes to leave the city if they valued their personal safety. It was this verbal threat which put in Cæsar’s hands the very useful plea that he was acting as the defender of the freedom of the Roman people.
The military strength of the two parties was, from the senatorial point of view, altogether on their side; they had, they reasoned, the whole empire to draw upon for recruits, while Cæsar had only his own province. The difficulty of the senatorial position was, that their forces were not together when the war broke out. Of Cæsar’s original thirteen legions, two were now under Pompeius’ command; besides this, the latter had in Spain seven legions of well-seasoned troops; in Italy he had the two legions already mentioned, which originally belonged to the army of Gaul; and another in a state of creation.
Cæsar’s chance lay in prompt action, in administering a decisive defeat before Pompeius could get his scattered men together. While the negotiations were in progress, he had only one legion in northern Italy; but two had been sent for, and when they were at hand Cæsar had, with his allies, about 20,000 men, a force considerably superior to that of Pompeius, who was especially careful not to lead Cæsar’s old legions against their former commander. With one legion of newly recruited men he could do nothing; the consequence was that in Italy there was practically no resistance to Cæsar’s advance. When some of the newly created cohorts joined him, the senators with their commander fled to Greece.