Little is known of the history of these cities during the half century which intervened between the fall of Crœsus and the outbreak of the revolt. If they tamely submitted to their fate during this period, the revolt itself becomes incomprehensible. There is absolutely no adequate immediate cause for it; and Herodotus’ own account of its beginning shows by certain significant phrases which he uses that, though the actual outbreak was premature, the design had existed before ever Aristagoras made his failure at Naxos. There is no record of an actual change of attitude on the part of Persia towards the towns during the years which immediately preceded it, which could lead to the supposition that the relations between them had become suddenly embittered.
The cause which lay behind the whole of the history of Darius’ dealings with the West is the feeling with which the Greek regarded the very idea of subjection. He must have been at the period the most restless subject that ever empire had. Darius seems to have recognized from the very first that the presence of this wayward, bold, intriguing race on the western fringe of his dominions constituted an ever-present danger. The intensity of the political feeling within the cities themselves with regard to their internal affairs, which is known to have existed within them at this time, indicates the intensity of the feeling with which they regarded the foreign yoke. Democrat, aristocrat, and tyrant did not fight their fierce battles with one another to win the prize of pre-eminence in servitude. The opponents would seek, too, for external support; and the satraps of the West must have been continually worried by appeals for assistance from whatever side assumed for the time being the philo-Persian rôle; and must have known, too, that the opposite side would seek for help elsewhere. And what was “elsewhere” likely to mean, save beyond the narrow seas, in European Greece? Nor can the intense desire for freedom in the mass of the populations of the Greek cities have remained in any way a secret from the Persian governors. There were plenty of people in every city whose interest it would be to tell tales of their neighbours, and it is perhaps the blackest blot on the character of the Greek that he was but too ready to betray his fellow-countrymen.
The problem which presented itself to Darius in the sixth century before Christ on the west coast of Asia must have been very similar to that which presented itself to Cæsar five and a half centuries later in North-west Gaul. Just as the Gaul of that period was likely to remain a restless subject of Rome so long as kinsmen beyond the Channel remained free, and so long as he might look to them for support in case of revolt, so was the Greek of Asia likely to be restive, even under the lightest yoke, so long as his kin beyond the Ægean remained unsubdued, and so long as their aid might be hoped for whenever he made up his mind to strike a blow for freedom.
The policy thus, in a way, forced upon Darius, was carried out in three steps, of which the second came near to being a retrograde one, and formed no part of the original programme, while the third was certainly not one of advance.
These are:—
(1) The Scythian Expedition;
(2) The Suppression of the Ionian Revolt;
(3) The Expeditions of 492 and 490.
It may seem strange to include the so-called Scythian Expedition in any design for the settlement of affairs in Western Asia. The name commonly attributed to it, for which Herodotus is mainly responsible, is, however, misleading. Neither he nor, in all probability, those Greeks who were contemporary with it, or even took part in it, were likely to understand its object. The Persian Government had the most overwhelming interest in concealing that object from the Greeks.
Greek imagination, however, could not resist the attractions of a subject so unknown and so vast and absolutely ran riot in dealing with it. Herodotus reproduces in detail the fantastic legend. It is not necessary to reproduce it here. The first aim must be to try and discover any solid facts in the story of the expedition. THE PERSIAN ARMY. The next, in view of the mass of modern literature which has sprung up with regard to it, must be to show what the expedition was not. Lastly, it will be necessary to point out the most reasonable hypothesis as to what it was, and to show its connection with such designs as Darius had upon Greece.
The very date of the expedition is a matter of extreme uncertainty. Dates ranging from 515 to 508 before Christ have been suggested by various authorities.[4] On the whole, it is most probable that it took place in 512.
A twofold tête-du-pont had already been acquired in Europe by the reduction of Byzantion and of the Thracian Chersonese, over the latter of which Miltiades, son of Kimon, who was destined to become famous at Marathon, bore rule.
The standing army of the Empire seems to have been singularly small, little more, indeed, than what was requisite for police duties at home and in the provinces. It was therefore necessary, when any great expedition was contemplated, to call for levies from the subject races. There were several reasons for this peculiar policy in military matters. It was manifestly an economy in time of peace. It made it unnecessary to entrust large bodies of troops, save under exceptional circumstances, to commanders in the remote provinces. The levy system was also an effective one when dealing with such enemies, within and without, as the Empire would have to meet in Asia, and this had been satisfactorily proved in many years of campaigning. It never really failed until brought face to face with an infinitely better armed foe, the Greek of Europe.