Without further concerning himself about the senate and the formalities of state law, he handed over the temporary administration of the capital to the praetor Marcus Aemilius Lepidus as city-prefect, and made the requisite arrangements for the administration of the provinces that obeyed him and the continuance of the war. Even amidst the din of the gigantic struggle, and with all the alluring sound of Caesar's lavish promises, it still made a deep impression on the multitude of the capital, when they saw in their free Rome the monarch for the first time wielding a monarch's power and breaking open the doors of the treasury by his soldiers. But the times had gone by, when the impressions and feelings of the multitude determined the course of events; it was with the legions that the decision lay, and a few painful feelings more or less were of no farther moment.
Caesar hastened to resume the war. He owed his successes hitherto to the offensive, and he intended still to maintain it. The position of his antagonist was singular. After the original plan of carrying on the campaign simultaneously in the two Gauls by offensive operations from the bases of Italy and Spain had been frustrated by Caesar's aggressive, Pompeius had intended to go to Spain. There he had a very strong position. The army amounted to seven legions; a large number of Pompeius' veterans served in it, and several years of conflicts in the Lusitanian mountains had hardened soldiers and officers. Among its captains Marcus Varro indeed was simply a celebrated scholar and a faithful partisan; but Lucius Afranius had fought with distinction in the east and in the Alps, and Marcus Petreius, the conqueror of Catilina, was an officer as dauntless as he was able. While in the Further province Caesar had still various adherents from the time of his governorship there[18], the more important province of the Ebrowas attached by all the ties of veneration and gratitude to the celebrated general, who twenty years before had held the command in it during the Sertorian war, and after the termination of that war had organized it anew. Pompeius could evidently after the Italian disaster do nothing better than proceed to Spain with the saved remnant of his army, and then at the head of his whole force advance to meet Caesar. But unfortunately he had, in the hope of being able still to save the troops that were in Corfinium, tarried in Apuli so long that he was compelled to choose the nearer Brundisium as his place of embarkation instead of the Campanian ports.
Why, master as he was of the sea and Sicily, he did not subsequently revert to his original plan, cannot be determined; whether it was that perhaps the aristocracy after their short-sighted and distrustful fashion showed no desire to entrust themselves to the Spanish troops and the Spanish population, it is enough to say that Pompeius remained in the east, and Caesar had the option of directing his first attack either against the army which was being organized in Greece under Pompeius' own command, or against that which was ready for battle under his lieutenants in Spain. He had decided in favour of the latter course, and, as soon as the Italian campaign ended, had taken measures to collect on the lower Rhone nine of his best legions, as also 6000 cavalry - partly men individually picked out by Caesar in the Celtic cantons, partly German mercenaries - and a number of Iberian and Ligurian archers.
But at this point his opponents also had been active. Lucius Domitius, who was nominated by the senate in Caesar's stead as governor of Transalpine Gaul, had proceeded from Corfinium - as soon as Caesar had released him - along with his attendants and with Pompeius' confidant Lucius Vibullius Rufus to Massilia, and actually induced that city to declare for Pompeius and even to refuse a passage to Caesar's troops. Of the Spanish troops the two least trustworthy legions were left behind under the command of Varro in the Further province; while the five best, reinforced by 40,000 Spanish infantry - partly Celtiberian infantry of the line, partly Lusitanian and other light troops - and by 5000 Spanish cavalry, under Afranius and Petreius, had, in accordance with the orders of Pompeius transmitted by Vibullius, set out to close the Pyrenees against the enemy.
Meanwhile Caesar himself arrived in Gaul and, as the commencement of the siege of Massilia still detained him in person, he immediately despatched the greater part of his troops assembled on the Rhone - six legions and the cavalry - along the great road leading by way of Narbo (Narbonne) to Rhode (Rosas) with the view of anticipating the enemy at the Pyrenees. The movement was successful; when Afranius and Petreius arrived at the passes, they found them already occupied by the Caesarians and the line of the Pyrenees lost. They then took up a position at Ilerda (Lerida) between the Pyrenees and the Ebro. This town lies twenty miles to the north of the Ebro on the right bank of one of its tributaries, the Sicoris (Segre), which was crossed by only a single solid bridge immediately at Ilerda. To the south of Ilerda the mountains which adjoin the left bank of the Ebro approach pretty close to the town; to the northward there stretches on both sides of the Sicoris a level country which is commanded by the hill on which the town is built. For an army, which had to submit to a siege, it was an excellent position; but the defence of Spain, after the occupation of the line of the Pyrenees had been neglected, could only be undertaken in earnest behind the Ebro, and, as no secure communication was established between Ilerda and the Ebro, and no bridge existed over the latter stream, the retreat from the temporary to the true defensive position was not sufficiently secured.
The Caesarians established themselves above Ilerda, in the delta which the river Sicoris forms with the Cinga (Cinca), which unites with it below Ilerda; but the attack only began in earnest after Caesar had arrived in the camp (23 June). Under the walls of the town the struggle was maintained with equal exasperation and equal valour on both sides, and with frequent alternations of success; but the Caesarians did not attain their object - which was, to establish themselves between the Pompeian camp and the town and thereby to possess themselves of the stone bridge - and they consequently remained dependent for their communication with Gaul solely on two bridges which they had hastily constructed over the Sicoris, and that indeed, as the river at Ilerda itself was too considerable to be bridged over, about eighteen or twenty miles farther up.
When the floods came on with the melting of the snow, these temporary bridges were swept away; and, as they had no vessels for the passage of the highly swollen rivers and under such circumstance the restoration of the bridges could not for the present be thought of, the Caesarian army was confined to the narrow space between the Cinca and the Sicoris, while the left bank of the Sicoris and with it the road, by which the army communicated with Gaul and Italy, were exposed almost undefended to the Pompeians, who passed the river partly by the town-bridge, partly by swimming after the Lusitanian fashion on skins. It was the season shortly before harvest; the old produce was almost used up, the new was not yet gathered, and the narrow stripe of land between the two streams was soon exhausted. In the camp actual famine prevailed - the modius of wheat cost 50 denarii (1 pound 16 shillings) - and dangerous diseases broke out; whereas on the left bank there were accumulated provisions and varied supplies, as well as troops of all sorts - reinforcements from Gaul of cavalry and archers, officers and soldiers from furlough, foraging parties returning - in all a mass of 6000 men, whom the Pompeians attacked with superior force and drove with great loss to the mountains, while the Caesarians on the right bank were obliged to remain passive spectators of the unequal conflict. The communications of the army were in the hands of the Pompeians; in Italy the accounts from Spain suddenly ceased, and the suspicious rumours, which began to circulate there, were not so very remote from the truth.
18. V. VII. Caesar in Spain.