History of the Peloponnesian War

Homer thus attests that there was anciently a great assembly and festival at Delos. In later times, although the islanders and the Athenians continued to send the choirs of dancers with sacrifices, the contests and most of the ceremonies were abolished, probably through adversity, until the Athenians celebrated the games upon this occasion with the novelty of horse-races.

The same winter the Ambraciots, as they had promised Eurylochus when they retained his army, marched out against Amphilochian Argos with three thousand heavy infantry, and invading the Argive territory occupied Olpae, a stronghold on a hill near the sea, which had been formerly fortified by the Acarnanians and used as the place of assizes for their nation, and which is about two miles and three-quarters from the city of Argos upon the sea-coast.

Meanwhile the Acarnanians went with a part of their forces to the relief of Argos, and with the rest encamped in Amphilochia at the place called Krenae, or the Wells, to watch for Eurylochus and his Peloponnesians, and to prevent their passing through and effecting their junction with the Ambraciots;

while they also sent for Demosthenes, the commander of the Aetolian expedition, to be their leader, and for the twenty Athenian ships that were cruising off Peloponnese under the command of Aristotle, son of Timocrates, and Hierophon, son of Antimnestus.