In Ariana, they passed the mountains, and, proceeding southwards, occupied the tract below the great lake wherein the Helmend terminates, which took from them the name of Saeastane ("land of the Saka," or Scyths)--a name still to be traced in the modern "Seistan." Further to the east they effected a lodgment in Kabul, and another in the the southern portion of the Indus valley, which for a time bore the name of Indo-Scythia.

They even crossed the Indus and attempted to penetrate into the interior of India, but here they were met and repulsed by a native monarch, about the year B.C.

56.
The people engaged in this great movement are called, in a general way, by the classical writers, Sacse, or Scythse--i.e.Scyths.

They consisted of a number of tribes, similar for the most part in language, habits, and mode of life, and allied more or less closely to the other nomadic races of Central and Northern Asia.

Of these tribes the principal were the Massagetse ("great Jits, or Jats"), who occupied the country on both sides of the lower course of the Oxus; the Dahse, who bordered the Caspian above Hyrcania, and extended thence to the latitude of Herat; the Tochari, who settled in the mountains between the upper Jaxartes and the upper Oxus, where they gave name to the tract known as Tokhar-estan; the Asii, or Asiani, who were closely connected with the Tochari, and the Sakarauli (Saracucse ?), who are found connected with both the Tochari and the Asiani.