The Asii or Asioi, were one of the Indo-European tribes mentioned in Roman and Greek accounts as responsible for the downfall of the state of Bactria circa 140 BCE. They have been identified as the Scythians, the Wusun, the Yuezhi, the Tocharians and/or the Alans.

The Asii or Asioi, were one of the Indo-European tribes mentioned in Roman and Greek accounts as responsible for the downfall of the state of Bactria circa 140 BCE. They have been identified as the Scythians, the Wusun, the Yuezhi, the Tocharians and/or the Alans.