Lepidus, pressed on two sides by Catulus and Pompeius, fought another engagement on the coast of Etruria in order merely to procure the means of retreat, and then embarked at the port of Cosa for Sardinia from which point he hoped to cut off the supplies of the capital, and to obtain communication with the Spanish insurgents.
But the governor of the island opposed to him a vigorous resistance; and he himself died, not long after his landing, of consumption (677), whereupon the war in Sardinia came to an end. A part of his soldiers dispersed; with the flower of the insurrectionary army and with a well-filled chest the late praetor, Marcus Perpenna, proceeded to Liguria, and thence to Spain to join the Sertorians.
The oligarchy was thus victorious over Lepidus; but it found itself compelled by the dangerous turn of the Sertorian war to concessions, which violated the letter as well as the spirit of the Sullan constitution. It was absolutely necessary to send a strong army and an able general to Spain; and Pompeius indicated, very plainly, that he desired, or rather demanded, this commission.
The pretension was bold. It was already bad enough that they had allowed this secret opponent again to attain an extraordinary command in the pressure of the Lepidian revolution; but it was far more hazardous, in disregard of all the rules instituted by Sulla for the magisterial hierarchy, to invest a man who had hitherto filled no civil office with one of the most important ordinary provincial governorships, under circumstances in which the observance of the legal term of a year was not to be thought of.
The oligarchy had thus, even apart from the respect due to their general Metellus, good reason to oppose with all earnestness this new attempt of the ambitious youth to perpetuate his exceptional position. But this was not easy. In the first place, they had not a single man fitted for the difficult post of general in Spain. Neither of the consuls of the year showed any desire to measure himself against Sertorius; and what Lucius Philippus said in a full meeting of the senate had to be admitted as too true - that, among all the senators of note, not one was able and willing to command in a serious war. Yet they might, perhaps, have got over this, and after the manner of oligarchs, when they had no capable candidate, have filled the place with some sort of makeshift, if Pompeius had merely desired the command and had not demanded it at the head of an army. He had already lent a deaf ear to the injunctions of Catulus that he should dismiss the army; it was at least doubtful whether those of the senate would find a better reception, and the consequences of a breach no one could calculate - the scale of aristocracy might very easily mount up, if the sword of a well-known general were thrown into the opposite scale.
So the majority resolved on concession. Not from the people, which constitutionally ought to have been consulted in a case where a private man was to be invested with the supreme magisterial power, but from the senate, Pompeius received proconsular authority and the chief command in Hither Spain; and, forty days after he had received it, crossed the Alps in the summer of 677.
First of all the new general found employment in Gaul, where no formal insurrection had broken out, but serious disturbances of the peace had occurred at several places; in consequence of which Pompeius deprived the cantons of the Volcae-Arecomici and the Helvii of their independence, and placed them under Massilia. He also laid out a new road over the Cottian Alps (Mont Genevre[21]), and so established a shorter communication between the valley of the Po and Gaul. Amidst this work the best season of the year passed away; it was not till late in autumn that Pompeius crossed the Pyrenees.
Sertorius had meanwhile not been idle. He had despatched Hirtuleius into the Further province to keep Metellus in check, and had himself endeavoured to follow up his complete victory in the Hither province, and to prepare for the reception of Pompeius.
The isolated Celtiberian towns there, which still adhered to Rome, were attacked and reduced one after another; at last, in the very middle of winter, the strong Contrebia (south-east of Saragossa) had fallen. In vain the hard-pressed towns had sent message after message to Pompeius; he would not be induced by any entreaties to depart from his wonted rut of slowly advancing. With the exception of the maritime towns, which were defended by the Roman fleet, and the districts of the Indigetes and Laletani in the north-east corner of Spain, where Pompeius established himself after he had at length crossed the Pyrenees, and made his raw troops bivouac throughout the winter to inure them to hardships, the whole of Hither Spain had at the end of 677 become by treaty or force dependent on Sertorius, and the district on the upper and middle Ebro thenceforth continued the main stay of his power. Even the apprehension, which the fresh Roman force and the celebrated name of the general excited in the army of the insurgents, had a salutary effect on it. Marcus Perpenna, who hitherto as the equal of Sertorius in rank had claimed an independent command over the force which he had brought with him from Liguria, was, on the news of the arrival of Pompeius in Spain, compelled by his soldiers to place himself under the orders of his abler colleague.
For the campaign of 678 Sertorius again employed the corps of Hirtuleius against Metellus, while Perpenna with a strong army took up his position along the lower course of the Ebro to prevent Pompeius from crossing the river, if he should march, as was to be expected, in a southerly direction with the view of effecting a junction with Metellus, and along the coast for the sake of procuring supplies for his troops. The corps of Gaius Herennius was destined to the immediate support of Perpenna; farther inland on the upper Ebro, Sertorius in person prosecuted meanwhile the subjugation of several districts friendly to Rome, and held himself at the same time ready to hasten according to circumstances to the aid of Perpenna or Hirtuleius. It was still his intention to avoid any pitched battle, and to annoy the enemy by petty conflicts and cutting off supplies.
Pompeius, however, forced the passage of the Ebro against Perpenna and took up a position on the river Pallantias, near Saguntum, whence, as we have already said, the Sertorians maintained their communications with Italy and the east. It was time that Sertorius should appear in person, and throw the superiority of his numbers and of his genius into the scale against the greater excellence of the soldiers of his opponent. For a considerable time the struggle was concentrated around the town of Lauro (on the Xucar, south of Valencia), which had declared for Pompeius and was on that account besieged by Sertorius. Pompeius exerted himself to the utmost to relieve it; but, after several of his divisions had already been assailed separately and cut to pieces, the great warrior found himself - just when he thought that he had surrounded the Sertorians, and when he had already invited the besieged to be spectators of the capture of the besieging army - all of a sudden completely outmanoeuvred; and in order that he might not be himself surrounded, he had to look on from his camp at the capture and reduction to ashes of the allied town and at the carrying off of its inhabitants to Lusitania - an event which induced a number of towns that had been wavering in middle and eastern Spain to adhere anew to Sertorius.
21. III. IV. Hannibal's Passage of the Alps.