The common treasury was at Delos, and the congresses were held in the temple.

Their supremacy commenced with independent allies who acted on the resolutions of a common congress.

It was marked by the following undertakings in war and in administration during the interval between the Median and the present war, against the barbarian, against their own rebel allies, and against the Peloponnesian powers which would come in contact with them on various occasions.

My excuse for relating these events, and for venturing on this digression, is that this passage of history has been omitted by all my predecessors, who have confined themselves either to Hellenic history before the Median War, or the Median War itself.
Hellanicus, it is true, did touch on these events in his Athenian history; but he is somewhat concise and not accurate in his dates.
Besides, the history of these events contains an explanation of the growth of the Athenian empire.
First the Athenians besieged and captured Eion on the Strymon from the Medes, and made slaves of the inhabitants, being under the command of Cimon, son of Miltiades.

Next they enslaved Scyros, the island in the Aegean, containing a Dolopian population, and colonized it themselves.
This was followed by a war against Carystus, in which the rest of Euboea remained neutral, and which was ended by surrender on conditions.