Tocharians in the context of "Kucha"

The Kushan Empire (c. 30–c. 375 CE) was a syncretic empire formed by the Yuezhi in the Bactrian territories in the early 1st century. It spread to encompass much of what is now Afghanistan, Eastern Iran, India, Pakistan, Western Nepal, Tajikistan and Uzbekistan. Kushan territory in India went at least as far as Saketa and Sarnath, now near Varanasi in Uttar Pradesh, where inscriptions have been found dating to the era of the Kushan emperor Kanishka the Great.

The Kushans were most probably one of five branches of the Yuezhi confederation, an Indo-European nomadic people of possible Tocharian origin, who migrated from northwestern China (Xinjiang and Gansu) and settled in ancient Bactria. The founder of the dynasty, Kujula Kadphises, followed Iranian and Greek cultural ideas and iconography after the Greco-Bactrian tradition and was a follower of the Shaivite sect of Hinduism. Many of the later Kushan kings after Kujula, were also patrons of Hinduism, including (but not limited to) Vima Kadphises and Vasudeva II. The Kushans in general were also great patrons of Buddhism, and, starting with Emperor Kanishka, they employed elements of Zoroastrianism in their pantheon. They played an important role in the spread of Buddhism to Central Asia and China, ushering in a period of relative peace for 200 years, sometimes described as "Pax Kushana".

Turkic peoples are a collection of diverse ethnic groups of West, Central, East, and North Asia as well as parts of Europe, who speak Turkic languages.

According to historians and linguists, the Proto-Turkic language originated in Central-East Asia, potentially in the Altai-Sayan region, Mongolia or Tuva. Initially, Proto-Turkic speakers were potentially both hunter-gatherers and farmers; they later became nomadic pastoralists. Early and medieval Turkic groups exhibited a wide range of both East Asian and West-Eurasian physical appearances and genetic origins, in part through long-term contact with neighboring peoples such as Iranic, Mongolic, Tocharian, Uralic and Yeniseian peoples.

Mahayana Buddhism entered Han China via the Silk Road, beginning in the 1st or 2nd century CE. The first documented translation efforts by Buddhist monks in China were in the 2nd century CE via the Kushan Empire into the Chinese territory bordering the Tarim Basin under Kanishka. These contacts transmitted strands of Sarvastivadan and Tamrashatiya Buddhism throughout the Eastern world.

Theravada Buddhism developed from the Pāli Canon in Sri Lanka Tamrashatiya school and spread throughout Southeast Asia. Meanwhile, Sarvastivada Buddhism was transmitted from North India through Central Asia to China. Direct contact between Central Asian and Chinese Buddhism continued throughout the 3rd to 7th centuries, much into the Tang period. From the 4th century onward, Chinese pilgrims like Faxian (395–414) and later Xuanzang (629–644) started to travel to northern India in order to get improved access to original scriptures. Between the 3rd and 7th centuries, parts of the land route connecting northern India with China was ruled by the Xiongnu, Han dynasty, Kushan Empire, the Hephthalite Empire, the Göktürks, and the Tang dynasty. The Indian form of Buddhist tantra (Vajrayana) reached China in the 7th century. Tibetan Buddhism was likewise established as a branch of Vajrayana, in the 8th century.

Tokharistan (or Tocharistan; lit. 'Land of the Tocharians') is a historical name used by Islamic sources in the early Middle Ages to refer to the area which was known as Bactria in Ancient Greek sources.

By the 6th century CE, Tokharistan came under rule of the First Turkic Khaganate, and in the 7th and 8th centuries, it was incorporated into the Tang dynasty, administered by the Protectorate General to Pacify the West. Today, Tokharistan is fragmented between Afghanistan, Uzbekistan and Tajikistan.

The Dharmaguptaka (Sanskrit: धर्मगुप्तक; Chinese: 法藏部; pinyin: Fǎzàng Bù; Vietnamese: Pháp Tạng bộ) is one of the eighteen or twenty early Buddhist schools, depending on the source. They are said to have originated from another sect, the Mahīśāsakas. The Dharmaguptakas had a prominent role in early Central Asian and Chinese Buddhism, and their Prātimokṣa (monastic rules for bhikṣus and bhikṣuṇīs) are still in effect in East Asian countries to this day, including China, Vietnam, Korea, and Japan as well as the Philippines. They are one of three surviving Vinaya lineages, along with that of the Theravāda and the Mūlasarvāstivāda.

Qocho or Kara-Khoja (Chinese: 高昌回鶻; pinyin: Gāochāng Huíhú; lit. 'Gaochang Uyghurs'), also known as Idiqut ("holy wealth"; "glory"; "lord of fortune"), was a Uyghur kingdom created in 843, with strong Chinese Buddhist and Tocharian influences. It was founded by refugees fleeing the destruction of the Uyghur Khaganate after being driven out by the Yenisei Kirghiz. They made their winter capital in Qocho (also called Gaochang or Qara-Khoja, near modern Turpan) and summer capital in Beshbalik (modern Jimsar County, also known as Tingzhou). Its population is referred to as the "Xizhou Uyghurs" after the old Tang Chinese name for Gaochang, the "Qocho Uyghurs" after their capital, the "Kucha Uyghurs" after another city they controlled, or the "Arslan ("Lion") Uyghurs" after their king's title.

Buddhism in Central Asia mainly existed in Mahayana forms and was 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. Buddhism dominated in Pre-Islamic Central Asia. It has been argued that the spread of Indian culture and religions, especially Buddhism, as far as Sogdia, corresponded to the rule of the Kidarites over the regions from Sogdia to Gandhara.

Buddhism has now been largely replaced by Islam in modern Central Asia. Uzbekistan and Kazakhstan have the most Buddhists, largely practiced by their Koryo-saram minority, although the former has the lowest percentage of Buddhists. Due to historical Tibetan, Mongol and Manchurian influence, Kyrgyzstan has the highest percentage of Buddhists in Central Asia.

The Tocharian (sometimes Tokharian) languages (US: /toʊˈkɛəriənˌ -ˈkɑːr-/ toh-KAIR-ee-ən, -⁠KAR-; UK: /tɒˈkɑːriən/ to-KAR-ee-ən), also known as the Agni-Kuči, Agnean-Kuchean or Kuchean-Agnean languages, are an extinct branch of the Indo-European language family spoken by inhabitants of the Tarim Basin, the Tocharians. The languages are known from manuscripts dating from the 5th to the 8th century AD, which were found in oasis cities on the northern edge of the Tarim Basin (now part of Xinjiang in Northwest China) and the Lop Desert. The discovery of these languages in the early 20th century contradicted the formerly prevalent idea of an east–west division of the Indo-European language family as centum and satem languages, and prompted reinvigorated study of the Indo-European family. Scholars studying these manuscripts in the early 20th century identified their authors with the Tokharoi, a name used in ancient sources for people of Bactria (Tokharistan). Although this identification is now believed to be mistaken, "Tocharian" remains the usual term for these languages.

The discovered manuscripts record two closely related languages, called Tocharian A (also East Tocharian or Turfanian) and Tocharian B (West Tocharian or Kuchean). The subject matter of the texts suggests that Tocharian A was more archaic and used as a Buddhist liturgical language, while Tocharian B was more actively spoken in the entire area from Turfan in the east to Tumshuq in the west. A body of loanwords and names found in Prakrit documents from the Lop Nur basin have been dubbed Tocharian C (Kroränian). A claimed find of ten Tocharian C texts written in Kharosthi has been discredited.