On the foundation of Megalopolis, in 371 BC, the inhabitants of Trapezus refused to remove to the new city; and having thus incurred the anger of the other Arcadians, they quitted Peloponnesus, and took refuge in Trapezus on the Pontus Euxeinus (modern Trabzon), where they were received as a kindred people.
The establishment of Megalopolis in 371 BC prompted the departure of Trapezus' residents, who rejected the new city and subsequently left Peloponnesus to seek refuge in Trapezus on the Pontus Euxeinus (modern Trabzon), where they were accepted as fellow Arcadians.