To return to our narrative. In the period which had elapsed since the peace with Carthage, there had been annual occupation for the Roman arms in Cisalpine Gaul, Liguria, and Spain. The Gauls, whose inaction all the time Hannibal was in Italy seems hard to account for, resumed arms in the year 201, at the instigation of one Hasdrubal, who had remained behind from the army of Mago; they took the colony of Placentia, and met several consular and prætorian armies in the field, and, after sustaining many great defeats, were completely reduced; the Ligurians, owing to their mountains, made a longer resistance, but they also were brought under the yoke of Rome. In Spain the various portions of its warlike population, ill brooking the dominion of strangers, rose continually in arms, but failed before the discipline of the Roman legions and the skill of their commanders. The celebrated M. Porcius Cato when consul (195) acquired great fame by his conduct in that country.
Philip of Macedonia, who with all his vices was an able prince, had long been making preparations for a renewed war with Rome, which he saw to be inevitable. He died however (179) before matters came to an extremity. His son and successor Perseus was a man of a very different character; for while he was free from his father’s love of wine and women, he did not possess his redeeming qualities, and was deeply infected by a mean spirit of avarice. It was reserved for him to make the final trial of strength with the Romans. Eumenes of Pergamus went himself to Rome, to represent how formidable he was become, and the necessity of crushing him; the envoys of Perseus tried in vain to justify him in the eyes of the jealous senate; war was declared (172) against him on the usual pretext of his injuring the allies of Rome, and the conduct of it was committed to P. Licinius Crassus, one of the consuls for the ensuing year.
[171-168 B.C.]
The Macedonian army amounted to thirty-nine thousand foot, one-half of whom were phalangites, and four thousand horse, the largest that Macedonia had sent to the field since the time of Alexander the Great. Perseus advanced into Thessaly at the head of this army (171), and at the same time the Roman legions entered it from Epirus. An engagement of cavalry took place not far from the river Peneus, in which the advantage was decidedly on the side of the king. In another encounter success was on that of the Romans; after which Perseus led his troops home for the winter and Licinius quartered his in Thessaly and Bœotia.
Nothing deserving of note occurred in the following year. In the spring of 169 the consul Q. Marcius Philippus led his army over the Cambunian mountains into Macedonia, and Perseus, instead of occupying the passes in the rear and cutting off his supplies from Thessaly, cravenly retired before him, and allowed him to ravage all the south of Macedonia. Marcius returned to Thessaly for the winter, and in the ensuing spring (168) the new consul, L. Æmilius Paulus (son of the consul who fell at Cannæ), a man of high consideration, of great talent, and who had in a former consulate gained much fame in Spain, came out to take the command.
Meantime the wretched avarice of Perseus was putting an end to every chance he had of success. Eumenes had offered, for the sum of fifteen hundred talents, to abstain from taking part in the war, and to endeavour to negotiate a peace for him: Perseus gladly embraced the offer, and was ready enough to arrange about the hostages which Eumenes agreed to give; but he hesitated to part with the money before he had had the value for it, and he proposed that it should be deposited in the temple at Samothrace till the war was ended. As Samothrace belonged to Perseus, Eumenes saw that he was not to be trusted, and he broke off the negotiation. Again, a body of Gauls, with ten thousand horse and an equal number of foot, from beyond the Ister, to whom he had promised large pay, were now at hand; Perseus sought to circumvent them and save his money, and the offended barbarians ravaged Thrace and returned home. It is the opinion of the historian, that if he had kept his word with these Gauls, and sent them into Thessaly, the situation of the Roman army, placed thus between two armies, might have been very perilous. Lastly, he agreed to give Gentius, king of Illyricum, three hundred talents if he went to war with the Romans: he sent ten of them at once, and directed those who bore the remainder to go very slowly; meantime his ambassador kept urging Gentius, who, to please him, seized two Roman envoys who arrived just then, and imprisoned them. Perseus, thinking him fully committed with the Romans by this act, sent to recall the rest of his money.