Hephthalite Empire
The Kushan Empire, a collection of Yuezhi tribes, took control of the region in the first century AD and ruled until the 4th century AD during which time Buddhism, Nestorian Christianity, Zoroastrianism, and Manichaeism were all practised in the region. Later the Hephthalite Empire, a collection of nomadic tribes, moved into the region and Arabs brought Islam in the early eighth century. Central Asia continued in its role as a commercial crossroads, linking China, the steppes to the north, and the Islamic heartland.