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 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, Achaeus accompanied the latter in an expedition over Mount Taurus, about two years before the period of which we are speaking. 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.