
The Kidarites were a dynasty that ruled Bactria and adjoining parts of Central Asia and South Asia in the 4th and 5th centuries. The Kidarites belonged to a complex of peoples known collectively in India as the Huna, and in Europe as the Chionites and may even be considered as identical to the Chionites. The Huna/Xionite tribes are often linked, albeit controversially, to the Huns who invaded Eastern Europe during a similar period. The Kidarites were named after Kidara one of their main rulers. The Kidarites appear to have been a part of a Huna horde known in Latin sources as the "Kermichiones" (from the Iranian Karmir Xyon) or "Red Huna". The Kidarites established the first of four major Xionite/Huna states in Central Asia, followed by the Alchon, the Hephthalites and the Nezak.
In 360–370 CE, a Kidarite kingdom was established in Central Asian regions previously ruled by the Sasanian Empire, replacing the Kushano-Sasanians in Bactria. Thereafter, the Sasanian Empire roughly stopped at Merv. Next, circa 390-410 CE, the Kidarites invaded northwestern India, where they replaced the remnants of the Kushan Empire in the area of Punjab. The Kidarites based their capital in Samarkand, where they were at the center of Central Asian trade networks, in close relation with the Sogdians. The Kidarites had a powerful administration and raised taxes, rather efficiently managing their territories, in contrast to the image of barbarians bent on destruction given by Persian accounts.