By the end of the 5th century the western parts fell under the sway of the "White Huns" (Ephthalites, or Tochari), while the eastern parts were under Tangut (Thygun) dominion.
The history of the century and a half that follows is very obscure; short-lived Saka dynasties succeeded one another until, about 388, the country was conquered by the Guptas of Magadha, who kept a precarious tenure of it till about 470, when their empire was destroyed by the White Huns, or Ephthalites, who, after breaking the power of Persia and assailing the Kushan kingdom of Kabul, poured into India, conquered Sind, and established their dominion as far south as the Nerbudda.
Passing by the present Tashkend, and by Samarkand, then inhabited by fire worshippers, he reached the basin of the Upper Oxus, which had recently been the seat of the powerful dominion of the Haiathelah, Ephthalites or White Huns, known in earlier days to the Greeks as Tochari, and to Honan Tsang (by the same name) as Tuholo or Tukhara.
Here a new foe soon arose in the shape of the Ephthalites (Haitab), also known as the White Runs, a barbaric tribe The Bphtha- which shortly after A.D.
As the external and internal distress still continued he was dethroned and imprisoned, but took refuge among the Ephthalites and was restored in 499 by their assistancelike Kavadhi so many Arsacids by the arms of the Dahae and Sacae.