The region of Trapezus (later called Trebizond, now Trabzon) was mentioned by Xenophon in his famous work "Anabasis", describing how he and other 10,000 Greek mercenaries fought their way to the Euxine Sea after the failure of the rebellion of Cyrus the Younger whom they fought for, against his older brother Artaxerxes II of Persia. Xenophon mentions that when at the sight of sea they shouted "Thalatta! Thalatta!" – "The sea! The sea!", the local people understood them. They were Greeks too and, according to Xenophon, they had been there for over 300 years. A whole range of trade flourished among the various Greek colonies, but also with the indigenous tribes who inhabited the Pontus inland. Soon Trebizond established a leading stature among the other colonies and the region nearby become the heart of the Pontian Greek culture and civilization. A notable inhabitant of the region was Philetaerus (c. 343 BC–263 BC) who was born to a Greek father in the small town of Tieion which was situated on the Black Sea coast of the Pontus Euxinus, he founded the Attalid dynasty and the Anatolian city of Pergamon in the second century BC.