Panathenaicus (257-258)

for they, alone of the Hellenes, could say that, albeit so few in number, they had never followed the lead or done the bidding of any one of the populous states, but had throughout been free and independent; and that they themselves in the war against the barbarians had held the place of leadership among all the Hellenes and had attained this honor, not without good reason, but because they had fought more battles than any other people in those times and had never been defeated in any one of them, when a king led them forth to battle, but had been victorious in all.

And no one could urge a stronger proof than this of their valor and their hardihood and of their concord amongst themselves, except that which I shall now mention: for of all the other Hellenic states, many as they are, no man could cite or find a single one which has not been involved in the misadventures which are wont to happen to states,