History of the Peloponnesian War

Uniting here at daybreak, they sat down at the place called Metropolis, and encamped. Not long afterwards the Athenians in the twenty ships came into the Ambracian Gulf to support the Argives, with Demosthenes and two hundred Messenian heavy infantry, and sixty Athenian archers.

While the fleet off Olpae blockaded the hill from the sea, the Acarnanians and a few of the Amphilochians, most of whom were kept back by force by the Ambraciots, had already arrived at Argos, and were preparing to give battle to the enemy, having chosen Demosthenes to command the whole of the allied army in concert with their own generals.