“The cavalry of Thessaly was six thousand strong: the heavy-armed infantry exceeded ten thousand; the numerous inhabitants of the surrounding mountains, subjects of the Thessalian cities, were excellent targeteers. In addition to this force then he had six thousand mercenaries in his pay; a body such as, for choice of men, and perfection of discipline, no commonwealth of Greece possessed. But connection with Athens did not suit his views; for the Athenians affected to be the first maritime power of Greece, and he meant to make Thessaly the first. The three necessaries to naval power were timber, hands, and revenue. With the former, Athens was supplied from Macedonia, which lay much more conveniently for the supply of Thessaly. With the second their Penestian subjects were a resource to which Athens had nothing equal.” (The Penestæ were a conquered people, reduced to a kind of vassalage under the Thessalians, for whom they performed menial and laborious offices, but were not held in a slavery so severe and degrading as the helots of Laconia, for we find them admitted to that military service, the cavalry, which was generally reckoned among the Greeks to assort only with rank above the lowest citizens.) It had been a practice of the Thessalian republics, always acknowledging some common bonds of union, to appoint, for extraordinary occasions a common military commander, a captain-general of the Thessalian nation, with the title of Tagus. To this high rank and great command Jason aspired, and the approbation of the Pharsalian government, it appears, was necessary. But he was far from so confining his views. Even the command of all Greece did not suffice for his ambition. “That all Greece might be reduced under their dominion,” he observed to Polydamas, “appeared probable from what he had already stated: but he conceived the conquest of the Persian empire to be a still easier achievement; the practical proof afforded by the return of the Cyrean Greeks, and by the great progress made with a very small force by Agesilaus, leaving this no longer a matter of mere speculation.”