The wretched Roman commander, however, knew not how or where to attack; the army marched to and fro in Thessaly, without accomplishing anything of importance. Perseus might have assumed the offensive; he saw that the Romans were badly led and dilatory; the news had passed like wildfire through Greece, that the Greek army had been brilliantly victorious in the first engagement; a second victory might lead to a general rising of the patriot party, and, by commencing a guerilla warfare, might produce incalculable results. But Perseus, while a good soldier, was not a general like his father; he had made his preparations for a defensive war, and, when things took a different turn, he felt himself as it were paralyzed. He made an unimportant success, which the Romans obtained in a second cavalry combai near Phalanna, a pretext for reverting, as is the habit of narrow and obstinate minds, to his first plan and evacuating Thessaly. This was of course equivalent to renouncing all idea of a Hellenic insurrection: what might have been attained by a different course was shown by the fact that, notwithstanding what had occurred, the Epirots changed sides. Thenceforth nothing serious was accomplished on either side. Perseus subdued king Genthius, chastised the Dardani, and, by means of Cotys, expelled from Thrace the Thracians friendly to Rome and the Pergamene troops. On the other hand the western Roman army took some Illyrian towns, and the consul busied himself in clearing Thessaly of the Macedonian garrisons and making sure of the turbulent Aetolians and Acarnanians by occupying Ambracia. But the heroic courage of the Romans was most severely felt by the unfortunate Boeotian towns which took part with Perseus; the inhabitants as well of Thisbae, which surrendered without resistance as soon as the Roman admiral Gaius Lucretius appeared before the city, as of Haliartus, which closed its gates against him and had to be taken by storm, were sold by him into slavery; Corcnea was treated in the same manner by the consul Crassus in spite even of its capitulation. Never had a Roman army exhibited such wretched discipline as the force under these commanders. They had so disorganized the army that, even in the next campaign of 584, the new consul Aulus Hostilius could not think of undertaking anything serious, especially as the new admiral Lucius Hortensius showed himself to be as incapable and unprincipled as his predecessor. The fleet visited the towns on the Thracian coast without result. The western army under Appius Claudius, whose headquarters were at Lychnidus in the territory of the Dassaretae, sustained one defeat after another: after an expedition to Macedonia had been utterly unsuccessful, the king in turn towards the beginning of winter assumed the aggressive with the troops which were no longer needed on the south frontier in consequence of the deep snow blocking up all the passes, took from Appius numerous townships and a multitude of prisoners, and entered into connections with king Genthius; he was able in fact to attempt an invasion of Aetolia, while Appius allowed himself to be once more defeated in Epirus by the garrison of a fortress which he had vainly besieged. The Roman main army made two attempts to penetrate into Macedonia: first, ovei the Cambunian mountains, and then through the Thessalian passes; but they were negligently planned, and both were repulsed by Perseus.

The consul employed himself chiefly in the reorganization of the army - a work which was above all things needful, but which required a sterner man and an officer of greater mark. Discharges and furloughs might be bought, and therefore the divisions were never up to their full numbers; the men were put into quarters in summer, and, as the officers plundered on a large, the common soldiers plundered on a small, scale. Friendly peoples were subjected to the most shameful suspicions: for instance, the blame of the disgraceful defeat at Larisa was imputed to the pretended treachery of the Aetolian cavalry, and, what was hitherto unprecedented, its officers were sent to be criminally tried at Rome; and the Molossians in Epirus were forced by false suspicions into actual revolt. The allied states had war-contributions imposed upon them as if they had been conquered, and if they appealed to the Roman senate, their citizens were executed or sold into slavery: this was done, for instance, at Abdera, and similar outrages were committed at Chalcis. The senate interfered very earnestly[4]: it enjoined the liberation of the unfortunate Coroneans and Abderites, and forbade the Roman magistrates to ask contributions from the allies without its leave. Gaius Lucretius was unanimously condemned by the burgesses. But such steps could not alter the fact, that the military result of these first two campaigns had been null, while the political result had been a foul stain on the Romans, whose extraordinary successes in the east were based in no small degree on their reputation for moral purity and solidity as compared with the scandals of Hellenic administration. Had Philip commanded instead of Perseus, the war would presumably have begun with the destruction of the Roman army and the defection of most of the Hellenes; but Rome was fortunate enough to be constantly outstripped in blunders by her antagonists. Perseus was content with entrenching himself in Macedonia - which towards the south and west is a true mountain-fortress - as in a beleaguered town.

The third commander-in-chief also, whom Rome sent to Macedonia in 585, Quintus Marcius Philippus, that already-mentioned upright guest-friend of the king, was not at all equal to his far from easy task. He was ambitious and enterprising, but a bad officer. His hazardous venture of crossing Olympus by the pass of Lapathus westward of Tempe, leaving behind one division to face the garrison of the pass, and making his way with his main force through impracticable denies to Heracleum, is not excused by the fact of its success. Not only might a handful of resolute men have blocked the route, in which case retreat was out of the question; but even after the passage, when he stood with the Macedonian main force in front and the strongly-fortified mountain-fortresses of Tempe and Lapathus behind him, wedged into a narrow plain on the shore and without supplies or the possibility of foraging for them, his position was no less desperate than when, in his first consulate, he had allowed himself to be similarly surrounded in the Ligurian defiles which thenceforth bore his name. But as an accident saved him then, so the incapacity of Perseus saved him now. As if he could not comprehend the idea of defending himself against the Romans otherwise than by blocking the passes, he strangely gave himself over as lost as soon as he saw the Romans on the Macedonian side of them, fled in all haste to Pydna, and ordered his ships to be burnt and his treasures to be sunk. But even this voluntary retreat of the Macedonian army did not rescue the consul from his painful position. He advanced indeed without hindrance, but was obliged after four days' march to turn back for want of provisions; and, when the king came to his senses and returned in all haste to resume the position which he had abandoned, the Roman army would have been in great danger, had not the impregnable Tempe surrendered at the right moment and handed over its rich stores to the enemy. The communication with the south was by this means secured to the Roman army; but Perseus had strongly barricaded himself in his former well-chosen position on the bank of the little river Elpius, and there checked the farther advance of the Romans. So the Roman army remained, during the rest of the summer and the winter, hemmed in in the farthest corner of Thessaly; and, while the crossing of the passes was certainly a success and the first substantial one in the war, it was due not to the ability of the Roman, but to the blundering of the Macedonian, general. The Roman fleet in vain attempted the capture of Demetrias, and performed no exploit whatever. The light ships of Perseus boldly cruised between the Cyclades, protected the corn-vessels destined for Macedonia, and attacked the transports of the enemy. With the western army matters were still worse: Appius Claudius could do nothing with his weakened division, and the contingent which he asked from Achaia was prevented from coming to him by the jealousy of the consul. Moreover, Genthius had allowed himself to be bribed by Perseus with the promise of a great sum of money to break with Rome, and to imprison the Roman envoys; whereupon the frugal king deemed it superfluous to pay the money which he had promised, since Genthius was now forsooth compelled, independently of it, to substitute an attitude of decided hostility to Rome for the ambiguous position which he had hitherto maintained. Accordingly the Romans had a further petty war by the side of the great one, which had already lasted three years. In fact had Perseus been able to part with his money, he might easily have aroused enemies still more dangerous to the Romans. A Celtic host under Clondicus - 10,000 horsemen and as many infantry - offered to take service with him in Macedonia itself; but they could not agree as to the pay. In Hellas too there was such a ferment that a guerilla warfare might easily have been kindled with a little dexterity and a full exchequer; but, as Perseus had no desire to give and the Greeks did nothing gratuitously, the land remained quiet.