[44.] What then makes Byzantium a most excellent site, and Calchedon the reverse, is just this: and although at first sight both positions seem equally convenient, the practical fact is that it is difficult to sail up to the latter, even if you wish to do so; while the current carries you to the former, whether you will or no, as I have just now shown. And a proof of my assertion is this: those who want to cross from Calchedon to Byzantium cannot sail straight across the channel, but coast up to the Cow and Chrysopolis,—which the Athenians formerly seized, by the advice of Alcibiades, B.C. 410. when they for the first time levied customs on ships sailing into the Pontus,[223]—and then drift down the current, which carries them as a matter of course to Byzantium. And the same is the case with a voyage on either side of Byzantium. For if a man is running before a south wind from the Hellespont, or to the Hellespont from the Pontus before the Etesian winds, if he keeps to the European shore, he has a direct and easy course to the narrow part of the Hellespont between Abydos and Sestos, and thence also back again to Byzantium: but if he goes from Calchedon along the Asiatic coast, the case is exactly the reverse, from the fact that the coast is broken up by deep bays, and that the territory of Cyzicus projects to a considerable distance. Nor can a man coming from the Hellespont to Calchedon obviate this by keeping to the European coast as far as Byzantium, and then striking across to Calchedon; for the current and other circumstances which I have mentioned make it difficult. Similarly, for one sailing out from Calchedon it is absolutely impossible to make straight for Thrace, owing to the intervening current, and to the fact that both winds are unfavourable to both voyages; for as the south wind blows into the Pontus, and the north wind from it, the one or the other of these must be encountered in both these voyages. These, then, are the advantages enjoyed by Byzantium in regard to the sea: I must now describe its disadvantages on shore.
[45.] They consist in the fact that its territory is so completely hemmed in by Thrace from shore to shore, that the Byzantines have a perpetual and dangerous war continually on hand with the Thracians. Disadvantages of Byzantium. For they are unable once for all to arm and repel them by a single decisive battle, owing to the number of their people and chiefs. For if they conquer one chief, three others still more formidable invade their territory. Nor again do they gain anything by consenting to pay tribute and make terms; for a concession of any sort to one brings at once five times as many enemies upon them. Therefore, as I say, they are burdened by a perpetual and dangerous war: for what can be more hazardous or more formidable than a war with barbarians living on your borders? Nay, it is not only this perpetual struggle with danger on land, but, apart from the evils that always accompany war, they have to endure a misery like that ascribed by the poets to Tantalus: for being in possession of an extremely fertile district, no sooner have they expended their labour upon it and been rewarded by crops of the finest quality, than the barbarians sweep down, and either destroy them, or collect and carry them off; and then, to say nothing of the loss of their labour and expense, the very excellence of the crops enhances the misery and distress of seeing them destroyed before their eyes. Still, habit making them able to endure the war with the Thracians, they maintained their original connexions with the other Greeks; but when to their other misfortunes was added the attack of the Gauls under Comontorius, they were reduced to a sad state of distress indeed.
[46.] These Gauls had left their country with Brennus, and having survived the battle at Delphi and made their way to the Hellespont, The Gauls, B.C. 279. instead of crossing to Asia, were captivated by the beauty of the district round Byzantium, and settled there. Then, having conquered the Thracians and erected Tyle[224] into a capital, they placed the Byzantines in extreme danger. In their earlier attacks, made under the command of Comontorius their first king, the Byzantines always bought them off by presents amounting to three, or five, or sometimes even ten thousand gold pieces, on condition of their not devastating their territory: and at last were compelled to agree to pay them a yearly tribute of eighty talents, until the time of Cavarus, in whose reign their kingdom came to an end; and their whole tribe, being in their turn conquered by the Thracians, were entirely annihilated. It was in these times, then, that being hard pressed by the payment of these exactions, the Byzantines first sent embassies to the Greek states with a prayer for aid and support in their dangerous situation: but being disregarded by the greater number, they, under pressure of necessity, attempted to levy dues upon ships sailing into the Pontus.
[47.] Now this exaction by the Byzantines of a duty upon goods brought from the Pontus, The Byzantines levy a toll. being a heavy loss and burden to everybody, was universally regarded as a grievance; and accordingly an appeal from all those engaged in the trade was made to the Rhodians, as acknowledged masters of the sea: and it was from this circumstance that the war originated of which I am about to speak.
For the Rhodians, roused to action by the loss incurred by themselves, as well as that of their neighbours, The Rhodians declare war, B.C. 220. at first joined their allies in an embassy to Byzantium, and demanded the abolition of the impost. The Byzantines refused compliance, being persuaded that they were in the right by the arguments advanced by their chief magistrates, Hecatorus and Olympidorus, in their interview with the ambassadors. The Rhodian envoys accordingly departed without effecting their object. But upon their return home, war was at once voted against Byzantium on these grounds; and messengers were immediately despatched to Prusias inviting his co-operation in the war: for they knew that Prusias was from various causes incensed with the Byzantines.
[48.] The Byzantines took steps of a similar nature, by sending to Attalus and Achaeus begging for their assistance. For his part Attalus was ready enough to give it: but his importance was small, because he had been reduced within the limits of his ancestral dominions by Achaeus. But Achaeus who exercised dominion throughout Asia on this side Taurus, and had recently established his regal power, promised assistance; and his attitude roused high hopes in the minds of the Byzantines, and corresponding depression in those of the Rhodians and Prusias. Achaeus. Achaeus was a relation of the Antiochus who had just succeeded to the kingdom of Syria; and he became possessed of the dominion I have mentioned through the following circumstances. After the death of Seleucus, father of the above-named Antiochus, and the succession of his eldest son Seleucus to the throne, B.C. 226. Achaeus accompanied the latter in an expedition over Mount Taurus, about two years before the period of which we are speaking.[225] For as soon as Seleucus the younger had succeeded to the kingdom he learnt that Attalus had already reduced all Asia on this side of Taurus under his power; and being accordingly eager to support his own rights, he crossed Taurus with a large army. There he was treacherously assassinated by Apaturius the Gaul, and Nicanor. Achaeus, in right of his relationship, promptly revenged his murder by killing Nicanor and Apaturius; and taking supreme command of the army and administration, conducted it with wisdom and integrity. For the opportunity was a convenient one, and the feeling of the common soldiers was all in favour of his assuming the crown; yet he refused to do so, and preserving the royal title for Antiochus the younger, son of Seleucus, went on energetically with the expedition, and the recovery of the whole of the territory this side Taurus. Meeting however with unexpected success,—for he shut up Attalus within the walls of Pergamus and became master of all the rest of the country,—he was puffed up by his good fortune, and at once swerved from his straightforward course of policy. He assumed the diadem, adopted the title of king, and was at this time the most powerful and formidable of all the kings and princes this side Taurus. This was the man on whose help the Byzantines relied when they undertook the war against the Rhodians and Prusias.
[49.] As to the provocations given before this to Prusias by the Byzantines they were various. Prusias. In the first place he complained that, having voted to put up certain statues of him, they had not done so, but had delayed or forgotten it. In the second place he was annoyed with them for taking great pains to compose the hostility, and put an end to the war, between Achaeus and Attalus; because he looked upon a friendship between these two as in many ways detrimental to his own interests. He was provoked also because it appeared that when Attalus was keeping the festival of Athene, the Byzantines had sent a mission to join in the celebration; but had sent no one to him when he was celebrating the Soteria. Nursing therefore a secret resentment for these various offences, he gladly snatched at the pretext offered him by the Rhodians; and arranged with their ambassadors that they were to carry on the war by sea, while he would undertake to inflict no less damage on the enemy by land.
Such were the causes and origin of the war between Rhodes and Byzantium.
[50.] At first the Byzantines entered upon the war with energy, in full confidence of receiving the assistance of Achaeus; Hostilities commence, B.C. 220. and of being able to cause Prusias as much alarm and danger by fetching Tiboetes from Macedonia as he had done to them. For Prusias, entering upon the war with all the animosity which I have described, had seized the place called Hieron at the entrance of the channel, which the Byzantines not long before had purchased for a considerable sum of money, because of its convenient situation; and because they did not wish to leave in any one else’s hands a point of vantage to be used against merchants sailing into the Pontus, or one which commanded the slave trade, or the fishing. Besides this, Prusias had seized in Asia a district of Mysia, which had been in the possession of Byzantium for many years past.