History of the Peloponnesian War
Thucydides
Thucydides. History of the Peloponnesian War. Crawley, Richard, translator. London and Toronto: J. M. Dent and Sons Ltd.; New York: E. P. Dutton and Co., 1914.
The Athenians then crossed over again to Euboea under the command of Pericles, and subdued the whole of the island: all but Histiaea was settled by convention; the Histiaeans they expelled from their homes, and occupied their territory themselves.
Not long after their return from Euboea, they made a truce with the Lacedaemonians and their allies for thirty years, giving up the posts which they occupied in Peloponnese, Nisaea Pegae, Troezen, and Achaia.
In the sixth year of the truce, war broke out between the Samians and Milesians about Priene. Worsted in the war, the Milesians came to Athens with loud complaints against the Samians. In this they were joined by certain private persons from Samos itself, who wished to revolutionize the government.