Turan

Turan is a historical region in Central Asia. The original Turanians were an Iranian tribe of the Avestan age. Turan comprised five areas: the Kopet Dag region, the Atrek valley, parts of Bactria, Sogdia and Margiana. In post-Avestan traditions they were thought to inhabit the region north of the Oxus. Their presence accompanied by incessant wars with the Iranians, helped to define Turan as a proud nation, proud of their land and ready to spill their blood in its defense. Summarize the following text using ONLY facts from it. Do NOT invent references, emails, or links. If the text doesn't mention something, leave it out. The term is of Iranian origin and may refer to a particular prehistoric human settlement, a historic geographical region, or a culture. The oldest existing mention of Turan is in the Farvardin yashts, which are in the Young Avesta language and have been dated by linguists to about 2500 years ago. The name Turan has been kept in historical memory in the north-eastern borders of the Sasanian Empire.