Once upon a time, indeed, there was a great assemblage of the Ionians and the neighbouring islanders at Delos, who used to come to the festival, as the Ionians now do to that of Ephesus, and athletic and poetical contests took place there, and the cities brought choirs of dancers.

Nothing can be clearer on this point than the following verses of Homer, taken from a hymn to Apollo: Phoebus, wherever thou strayest, far or near, Delos was still of all thy haunts most dear.
Thither the robed Ionians take their way With wife and child to keep thy holiday, Invoke thy favour on each manly game, And dance and sing in honour of thy name.
That there was also a poetical contest in which the Ionians went to contend, again is shown by the following, taken from the same hymn.
After celebrating the Delian dance of the women, he ends his song of praise with these verses, in which he also alludes to himself: Well, may Apollo keep you all! and so, Sweethearts, good-bye--yet tell me not I go Out from your hearts; and if in after hours Some other wanderer in this world of ours Touch at your shores, and ask your maidens here Who sings the songs the sweetest to your ear, Think of me then, and answer with a smile, 'A blind old man of Scio's rocky isle.' 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 Crenae, 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.

On their part, the Ambraciots at Olpae sent a messenger to their own city, to beg them to come with their whole levy to their assistance, fearing that the army of Eurylochus might not be able to pass through the Acarnanians, and that they might themselves be obliged to fight single-handed, or be unable to retreat, if they wished it, without danger.
Meanwhile Eurylochus and his Peloponnesians, learning that the Ambraciots at Olpae had arrived, set out from Proschium with all haste to join them, and crossing the Achelous advanced through Acarnania, which they found deserted by its population, who had gone to the relief of Argos; keeping on their right the city of the Stratians and its garrison, and on their left the rest of Acarnania.