A peace was ready to be concluded, when the Romans, deeply interested in the prolongation of war, sent their fleet to support the Ætolians; who, encouraged also by the prospect of acquiring another ally, Attalus, king of Pergamus, boldly set Philip at defiance, and talked of terms to which they knew he would not submit. The moderation of Philip strengthened the indignation of his Greek confederates against the Ætolians; a disposition which he soon found an opportunity of calling forth into action. Intelligence being brought to him, whilst he was assisting at the Nemean games, that the Romans had landed, and were laying waste the country from Corinth to Sicyon, he instantly set out, attacked and repulsed the enemy, and, before the conclusion of the games, returned again to Argos; an achievement which greatly distinguished him in the eyes of all Greece, assembled at that solemnity. After other vigorous, though unsuccessful, exertions against the Romans, he was called back, by domestic insurrections, to Macedon.
The Achæan states, though deprived of the powerful aid of the Macedonian king, still carried on their military operations under the conduct of Philopœmen of Megalopolis, in Arcadia, an enthusiast in the cause of liberty from his earliest years, and one who had been active in bringing over several of the Arcadians to join the Achæan League. Soon after the death of Aratus, to whom he was as much superior in military, as he was inferior in political abilities, he attained the chief sway in the Achæan councils. He saw with concern the humiliating condition to which a foreign yoke had reduced his countrymen, and conceived the noble resolution of relieving them from it. In the character of general of Achaia, he improved their discipline, inured them to hardship and toil, and gave them weightier armour, and more powerful weapons. The effect of this discipline soon appeared: the armies of Ætolia and Elis, which attacked them in Philip’s absence, were totally defeated. In the meantime, the Romans, supported by Attalus, attacked Eubœa, of all the provinces of Greece, though an island, one of the most considerable for fertility of soil, extent of territory, and advantage of situation. Philip, on his part, kept a watchful eye on his enemies: his military preparations were vigorous, and not without success. The war was prolonged, with various success, for six years, when the Romans and Attalus retired from Greece. A peace was now concluded between the Ætolians and Romans, on the one part, and Philip on the other, whose successful ambition led him, by a natural progress, to attack the dominions of the king of Egypt.
[205-199 B.C.]
The Romans, whose policy it was never to have more enemies on their hands than one at a time, had consented to a peace with Macedon, because they were involved in a war with Carthage; but that war being now at an end, they eagerly embraced the first pretexts they could find for a rupture with the prince, whose successes had excited a jealousy of his growing power. Complaints being brought before that political and powerful people from Attalus, from the Rhodians, from the Athenians, and from Egypt, they readily determined to improve so favourable a juncture. And first, they declared themselves the guardians of the young king of Egypt. Marcus Æmilius was despatched from Rome, to announce to Philip the intentions of the Roman senate. The ambassador found the king before Abydos, at the head of an army flushed with victory. Philip was not insensible of the advantage of his situation; yet the Roman, undaunted by the deportment of the monarch, charged him with dignity and firmness, not to attack the possessions of the crown of Egypt; to abstain from war with any of the Grecian states; and to submit the matters in dispute between him, Attalus, and the Rhodians, to fair arbitration. “The boastful inexperience of youth,” said the king, “thy gracefulness of person, and, still more, the name of Roman, inspire thee with this haughtiness. It is my wish, that Rome may observe the faith of treaties; but should she be inclined again to hazard an appeal to arms, I trust that, with the protection of the gods, I shall render the Macedonian name as formidable as that of the Roman.” These things, with the cruel destruction of the city and inhabitants of Abydos, happened about 199 B.C.