History of the Peloponnesian War

Now against the wall on [*]( Literally, having walled off, i.e. cut off by a transverse wall from communication with the country. The absence of any such wall on the opposite side of the city is afterwards expressed by τὴν παλλήνην ἀτείχιστον οὖσαν.) the side of the isthmus the Athenians immediately raised works, and manned them. But that towards Pallene had no works raised against it; for they did not think themselves strong enough both to keep a garrison on the isthmus, and to cross over to Pallene and raise works there; fearing that the Potidaeans and their allies might attack them when divided.

And the Athenians in the city, hearing that Pallene had no works on it, some time after send sixteen hundred heavy-armed of their own, and Phormio, the son of Asopius, as general; who reached Pallene, and setting out from Aphytis, [*]( I do not think that more is meant by ὁρμώμενος in this passage than that he set out by land from Aphytis, having come with his ships to that place, as being the most convenient for his plan of advancing to Potidaea through Pallene.) led his army to Potidaea, advancing by short marches, and ravaging the country at the same time: and when no one came out to offer him battle, he threw up works against the wall on the side of Pallene.

And thus Potidaea was now besieged with all their power, on both sides, and from the sea at the same time by ships that were blockading it.