The History of Rome, Books 27 to 36 - Livy

It happened that, just at this time, the consul, Manius Acilius, having crossed the sea with twenty thousand foot, two thousand horse, and fifteen elephants, ordered some military tribunes, chosen for the purpose, to lead the infantry to Larissa, and he himself with the cavalry came to Limnaea, to Philip. Immediately on the consul's arrival a surrender was made without hesitation, and the king's garrison, together with the Athamanians, were delivered up. From Limnaea the consul went to Pellinaeum. Here the Athamanians surrendered first, and afterwards Philip of Megalopolis. King Philip, happening to meet the latter as he was coming out from the town, ordered his attendants, in derision, to salute him with the title of king; and he himself, coming up to him, with a sneer, highly unbecoming his own exalted station, addressed him as Brother. Having been brought before the consul he was ordered to be kept in confinement, and soon after was sent to Rome in chains. All the rest of the Athamanians, together with the soldiers of king Antiochus, who had been in garrison in the towns which surrendered about that time, were delivered over to Philip. They amounted to three thousand men. The consul went thence to Larissa, in order to hold a consultation on the general plan of operations; and on his way was met by ambassadors from Pieria and Metropolis, with the surrender of those cities. Philip treated the captured, particularly the Athamanians, with great kindness, in order that through them he might conciliate their countrymen; and having hence conceived hopes of getting Athamania into his possession, he first sent forward the prisoners to their respective states, and then marched his army thither. These also, making mention of the king's clemency and generosity towards them, exerted a powerful influence on the minds of their fellow-countrymen; and Amynander, who, by his presence, had retained many in obedience, through the respect paid to his dignity, began now to dread that he might be delivered up to Philip, who had been long his professed enemy, or to the Romans, who were justly incensed against him for his late defection. He, therefore, with his wife and children, quitted the kingdom, and retired to Ambracia. Thus all Athamania came under the authority and dominion of Philip. The consul delayed a few days at Larissa, for the purpose chiefly of refreshing the horses, which, by the voyage first, and marching afterwards, had been much harassed and fatigued; and when he had renewed the vigour of his army by a moderate share of rest, he marched to Cranon. On his way, Pharsalus, Scotussa, and Pherae were surrendered to him, together with the garrisons placed in them by Antiochus. He asked these men whether any of them chose to remain with him; and one thousand having declared themselves willing, he gave them to Philip; the rest he sent back, unarmed, to Demetrias. After this he took Proerna, and the forts adjacent; and then began to march forwards toward the Malian bay. When he drew near to the pass on which Thaumaci is situated, all the young men of that place, having taken arms and quitted the town, placed themselves in ambush in the woods and roads, and thence, from the higher grounds, made attacks on the Roman troops as they marched. The consul first sent people to talk with them from a short distance, and deter them from such a mad proceeding; but, finding that they persisted in their undertaking, he sent round a tribune, with two companies of soldiers, to cut off the retreat of the men in arms, and took possession of the defenceless city. The shouting on the capture of the city having been heard from behind, a great slaughter was made of those who had been in ambuscade, and who fled homewards from all parts of the woods. From Thaumaci the consul came, on the second day, to the river Spercheus; and, sending out parties, laid waste the country of the Hypataeans.

During these transactions, Antiochus was at Chalcis; and now, perceiving that he had gained nothing from Greece agreeable, except winter quarters and a disgraceful marriage at Chalcis, he warmly blamed Thoas, and the fallacious promises of the Aetolians; while he admired Hannibal, not only as a prudent man, but as the predicter of all those events which were then transpiring. However, that he might not still further defeat his inconsiderate enterprise by his own inactivity, he sent requisitions to the Aetolians, to arm all their young men, and assemble in a body at Lamia. He himself also immediately led thither about ten thousand foot (the number having been filled up out of the troops which had come after him from Asia) and five hundred horse. Their assembly on this occasion was far less numerous than ever before, none attending but the chiefs with a few of their vassals. These affirmed that they had, with the utmost diligence, tried every method to bring into the field as great a number as possible out of their respective states, but that they had not prevailed either by argument, persuasion, or authority, against those who declined the service. Being disappointed thus on all sides, both by his own people, who delayed in Asia, and by his allies, who did not fulfil those engagements by which they had prevailed on him to comply with their invitation, the king retired beyond the pass of Thermopylae. A range of mountains here divides Greece in the same manner as Italy is divided by the ridge of the Apennines. Outside the strait of Thermopylae, towards the north, lie Epirus, Perrhaebia, Magnesia, Thessaly, the Achaean Phthiotis, and the Malian bay; on the inside, towards the south, the greater part of Aetolia, Acarnania, Phocis, Locris, Boeotia, and the adjacent island of Euboea, the territory of Attica, which stretches out like a promontory into the sea, and, behind that, the Peloponnesus. This range of mountains, which extends from Leucas and the sea on the west, through Aetolia to the opposite sea on the east, is so closely covered with thickets and craggy rocks, that, not to speak of an army, even persons lightly equipped for travelling can with difficulty find paths through which they can pass. The hills at the eastern extremity are called Oeta, and the highest of them Callidromus; in a valley, at the foot of which, reaching to the Malian bay, is a passage not broader than sixty paces. This is the only military road by which an army can be led, even if it should not be opposed. The place is therefore called Pylae, the gate; and by some, on account of a warm spring, rising just at the entrance of it, Thermopylae. It is rendered famous by the memorable battle of the Lacedaemonians against the Persians, and by their still more glorious death.

With a very inferior portion of spirit, Antiochus now pitched his camp within the enclosures of this pass, the difficulties of which he increased by raising fortifications; and when he had completely strengthened every part with a double rampart and trench, and, wherever it seemed requisite, with a wall formed of the stones which lay scattered about in abundance, being very confident that the Roman army would never attempt to force a passage there, he sent away one half of the four thousand Aetolians, the number that had joined him, to garrison Heraclea, which stood opposite the entrance of the defile, and the other half to Hypata; for he concluded, that the consul would undoubtedly attack Heraclea, and he received accounts from many hands, that all the districts round Hypata were being laid waste. The consul, after ravaging the lands of Hypata first, and then those of Heraclea, in both which places the Aetolian detachments proved useless, encamped opposite to the king, in the very entrance of the pass, near the warm springs; both parties of the Aetolians shutting themselves up in Heraclea. Antiochus, who, before he saw the enemy, thought every spot perfectly well fortified, and secured by guards, now began to apprehend, that the Romans might discover some paths among the hills above, through which they could make their way; for he had heard that the Lacedaemonians formerly had been surrounded in that manner by the Persians, and Philip, lately, by the Romans themselves. He therefore despatched a messenger to the Aetolians at Heraclea, desiring them to afford him so much assistance, at least in the war, as to seize and secure the tops of the hills, so that the Romans might not be able to pass them at any part. When this message was received, a dissension arose among the Aetolians: some insisted that they ought to obey the king's orders, and go; others, that they ought to lie still at Heraclea, and wait the issue, whatever it might be; for if the king should be defeated by the consul, their forces would be fresh, and in readiness to carry succour to their own states in the neighbourhood; and if he were victorious, they could pursue the Romans, while scattered in their flight. Each party not only adhered positively to its own plan, but even carried it into execution; two thousand lay still at Heraclea; and two thousand, divided into three parties, took possession of the summits called Callidromus, Rhoduntia, and Tichiuns.