History of the Peloponnesian War

For also after the Trojan war the Grecians continued still their shifting and transplantations; insomuch as never resting, they improved not their power.

For the late return of the Greeks from Ilium caused not a little innovation; and in most of the cities there arose seditions, and those which were driven out built cities for themselves in other places.

For those that are now called Boeotians in the sixtieth year after the taking of Troy expelled Arne by the Thessalians, seated themselves in that country which, now Boeotia, was then called Cadmeis. (But there was in the same country a certain portion of that nation before, of whom also were they that went to the warfare of Troy.) And in the eightieth year the Dorians together with the Heracleidae seized on Peloponnesus.

And with much ado, after long time, Greece had constant rest and, shifting their seats no longer, at length sent colonies abroad. And the Athenians planted Ionia and most of the islands, and the Peloponnesians most of Italy and Sicily and also certain parts of the rest of Greece. But these colonies were all planted after the Trojan war.