History of the Peloponnesian War

About the same time, in the end of summer, the Ambraciotes, both they themselves and divers barbarian nations by them raised, made war against Argos of Amphilochia and against the rest of that territory.

The quarrel between them and the Argives arose first from hence.

This Argos and the rest of Amphilochia was planted by Amphilochus the son of Amphiaraus after the Trojan war, who, at his return, misliking the then state of Argos, built this city in the Gulf of Ambracia and called it Argos after the name of his own country.

And it was the greatest city and had the most wealthy inhabitants of all Amphilochia.