Buddhism in Central Asia refers to the forms of Buddhism that existed in Central Asia, which were historically especially prevalent along the Silk Road. The history of Buddhism in Central Asia is closely related to the Silk Road transmission of Buddhism during the first millennium of the common era.
A number of Early Buddhist schools were historically prevalent throughout Central Asia. A number of scholars identify three distinct major phases of missionary activities seen in the history of Buddhism in Central Asia, which are associated with the following sects (chronologically):
The Dharmaguptaka made more efforts than any other sect to spread Buddhism outside India, to areas such as Afghanistan, Central Asia, and China, and they had great success in doing so. Therefore, most countries which adopted Buddhism from China, also adopted the Dharmaguptaka vinaya and ordination lineage for bhikṣus and bhikṣuṇīs. According to A.K. Warder, in some ways in those East Asian countries, the Dharmaguptaka sect can be considered to have survived to the present. Warder further writes:
It was the Dharmaguptakas who were the first Buddhists to establish themselves in Central Asia. They appear to have carried out a vast circling movement along the trade routes from Aparānta north-west into Iran and at the same time into Oḍḍiyāna (the Suvastu valley, north of Gandhāra, which became one of their main centres). After establishing themselves as far west as Parthia they followed the "silk route", the east-west axis of Asia, eastwards across Central Asia and on into China, where they effectively established Buddhism in the second and third centuries A.D. The Mahīśāsakas and Kāśyapīyas appear to have followed them across Asia into China. [...] For the earlier period of Chinese Buddhism it was the Dharmaguptakas who constituted the main and most influential school, and even later their Vinaya remained the basis of the discipline there.