History of the Peloponnesian War

Even after the Trojan war Hellas was still engaged in removing and settling, and thus could not attain to the quiet which must precede growth.

The late return of the Hellenes from Ilium caused many revolutions, and factions ensued almost everywhere; and it was the citizens thus driven into exile who founded the cities.

Sixty years after the capture of Ilium the modern Boeotians were driven out of Arne by the Thessalians, and settled in the present Boeotia, the former Cadmeis; though there was a division of them there before, some of whom joined the expedition to Ilium. Twenty years later the Dorians and the Heraclids became masters of Peloponnese; so that much had to be done

and many years had to elapse before Hellas could attain to a durable tranquillity undisturbed by removals, and could begin to send out colonies, as Athens did to Ionia and most of the islands, and the Peloponnesians to most of Italy and Sicily and some places in the rest of Hellas. All these places were founded subsequently to the war with Troy.