History of the Peloponnesian War

For a hundred kept guard round Attica, Euboea, and Salamis, while another hundred were cruising about the Peloponnese, besides those at Potidaea and in other places; so that altogether there were two hundred and fifty [in service] in the course of that one summer. And it was this, in conjunction with Potidaea, that most exhausted their revenues.

For at Potidaea the number of heavy-armed that kept guard at two drachmas a day,