History of the Peloponnesian War

There were certain men of the Plataeans who called them in, and opened the gates to them, namely, Nauclides and his party, who wished, for the sake of their own power, to put to death those of the citizens who were opposed to them, and to put the city into the hands of the Thebans.

They carried on these negotiations through Eurymachus, the son of Leontiades, a very influential person at Thebes. For the Thebans, foreseeing that the war would take place, wished to surprise Plataea, which had always been at variance with them, while it was still time of peace, and the war had not openly broken out. And on this account, too, they entered the more easily without being observed, as no guard had been set before [the gates].

After piling their arms in the market-place, they did not comply with the wish of those who called them in by immediately setting to work, and going to the houses of their adversaries; but determined to make a proclamation in friendly terms, and to bring the city to an agreement rather, and to friendship; and the herald proclaimed, that whoever wished to make alliance according to the hereditary principles of all the Boeotians, should come and [*]( The Thebans, as usual on a halt, proceeded to pile their arms, and by Inviting the Plataeans to pile theirs with them, they meant that they should come in arms from their several houses to join them, and thus naturally pile their spears and shields with those of their friends, to be taken up together with theirs, whenever they should be required either to march or to fight —Arnold. See his whole note.) pile his arms with them, supposing that the city would easily come over to them by this method.

The Plataeans, on finding that the Thebans were within their walls, and that their city was unexpectedly taken, being very much alarmed, and thinking that far more had entered than really had, (for they did not see them in the night,) came to an agreement, and having accepted the terms, remained quiet; especially since they were proceeding to no violent measures against any one.