The campaigns of 584 and 585 were not more fortunate for the Roman arms. A consul had the rash idea of invading Macedonia by the passes of Callipeuce, where his army would have been annihilated if the king had had the courage to defend himself. At the approach of the legions he took to flight, and the Romans escaped from their perilous position without loss.[577] At length, the people, feeling the necessity of having an eminent man at the head of the army, nominated Paulus Æmilius consul, who had given many proofs of his military talents in the Cisalpine. Already the greater part of the Gallo-græci were in treaty with Perseus. The Illyrians and the people of the Danube offered to second him. The Rhodians, and the King of Pergamus himself, persuaded that Fortune was going to declare herself for the King of Macedonia, made him offers of alliance; he chaffered with them with the most inexplicable levity. In the mean time, the Roman army, ably conducted, advanced by forced marches. One single combat terminated the war; and the battle of Pydna, in 586, once more proved the superiority of the Roman legion over the phalanx. This, however, did not yield ingloriously; and, though abandoned by their king, who fled, the Macedonian hoplites died at their post.
When they heard of this defeat, Eumenes and the Rhodians hastened to wipe out the remembrance of their ever having doubted the fortune of Rome[578] by the swiftness of their repentance. At the same time, L. Anicius conquered Illyria and seized the person of Gentius. Macedonia was divided into four states called _free_, that is to say, presided over by magistrates chosen by themselves, but under the protectorate of the Republic. By the law imposed on these new provinces, all marriages, and all exchange of immovable property, were interdicted between the citizens of different states,[579] and the imports reduced one-half. As we see, the Republic applied the system practised in 416 to dissolve the Latin confederacy, and later, in 449, that of the Hernici. Illyria was also divided into three parts. The towns which had first yielded were exempt from all tribute, and the taxes of the others reduced to half.[580]
It is not uninteresting to recall to mind how Livy appreciates the institutions which Macedonia and Illyria received at this epoch. “It was decreed,” he says, “that liberty should be given to the Macedonians and Illyrians, to prove to the whole universe that, in carrying their arms so far, the object of the Romans was to deliver the enslaved peoples, not to enslave the free peoples; to guarantee to these last their independence, to the nations subject to kings a milder and more just government; and to convince them that, in the wars which might break out between the Republic and their sovereigns, the result would be the liberty of the peoples: Rome reserving to herself only the honour of victory.”[581]