The Phasians (Phasiani, or Phasianoi; Greek: Φασιανοί) were a subdivision of the Colchian tribes located in the eastern part of Pontus. The Greek commander Xenophon, who encountered them during his march through Asia Minor to the Black Sea (401-400 BC), places them on the river Phasis. Here, the Phasis of Xenophon is not the common Graeco-Roman designation for the modern day Rioni River in Georgia, but rather the sources of Araxes in what is now northeastern Turkey.[1] At the time when Xenophon met them, the Phasians were in control of the long valley to the north of Cilligül Dağ,[1] and lived in the neighborhood of the Chalybians and Taochoi, presumably proto-Georgian tribes.[2]
In his classic work On Airs, Waters, and Places, the Greek physician Hippocrates described the Phasians, c. 400 BC, as having "shapes different from those of all other men; for they are large in stature, and of a very gross habit of body, so that not a joint nor vein is visible; in color they are sallow, as if affected with jaundice. Of all men they have the roughest voices, from their breathing an atmosphere which is not clear, but misty and humid; they are naturally rather languid in supporting bodily fatigue."
The name of this tribe seems to have survived in the latter-day regional toponyms – Byzantine Phasiane, Armenian Basean, Georgian Basiani, and Turkish Pasin.[3]