housand heavy
infantry of their own citizens, besides a number of their allies, and
six hundred Macedonian horsemen, the followers of Philip and Pausanias.
With these sailed seventy ships along the coast. Advancing by short
marches, on the third day they arrived at Gigonus, where they encamped.

Meanwhile the Potidaeans and the Peloponnesians with Aristeus were
encamped on the side looking towards Olynthus on the isthmus, in
expectation of the Athenians, and had established their market outside
the city. The allies had chosen Aristeus general of all the infantry;
while the command of the cavalry was given to Perdiccas, who had at
once left the alliance of the Athenians and gone back to that of the
Potidaeans, having deputed Iolaus as his general: The plan of Aristeus
was to keep his own force on the isthmus, and await the attack of the
Athenians; leaving the Chalcidians and the allies outside the isthmus,
and the two hundred cavalry from Perdiccas in Olynthus to act upon the
Athenian rear, on the occasion of their advancing against him; and thus
to place the enemy between two fires. While Callias the Athenian general
and his colleagues dispatched the Macedonian horse and a few of the
allies to Olynthus, to prevent any movement being made from that
quarter, the Athenians themselves broke up their camp and marched
against Potidaea. After they had arrived at the isthmus, and saw the
enemy preparing for battle, they formed against him, and soon afterwards
engaged. The wing of Aristeus, with the Corinthians and other picked
troops round him, routed the wing opposed to it, and followed for
a considerable distance in pursuit. But the rest of the army of the
Potidaeans and of the Peloponnesians was defeated by the Athenians,
and took refuge within the fortifications. Returning from the pursuit,
Aristeus perceived the defeat of the rest of the army. Being at a
loss which of the two risks to choose, whether to go to Olynthus or to
Potidaea, he at last determined to draw his men into as small a space
as possible, and force his way with a run into Potidaea. Not without
difficulty, through a storm of missiles, he passed along by the
breakwater through the sea, and brought off most of his men safe,
though a few were lost. Meanwhile the auxiliaries of the Potidaeans from
Olynthus, which is about seven miles off and in sight of Potidaea, when
the battle began and the signals were raised, advanced a little way
to render assistance; and