Alchon Huns in the context of "Hephthalite Empire"

The Hephthalites (Bactrian: ηβοδαλο, romanized: Ebodalo), sometimes called the White Huns (also known as the White Hunas, in Iranian as the Spet Xyon and in Sanskrit and Prakrit as the Sveta-huna), were a people who lived in Central Asia during the 5th to 8th centuries CE, part of the larger group of Eastern Iranian Huns. They formed an empire, the Imperial Hephthalites, and were militarily important from 450 CE, when they defeated the Kidarites, to 560 CE, when combined forces from the First Turkic Khaganate and the Sasanian Empire defeated them. After 560 CE, they established "principalities" in the area of Tokharistan, under the suzerainty of the Western Turks (in the areas north of the Oxus) and of the Sasanian Empire (in the areas south of the Oxus), before the Tokhara Yabghus took over in 625.

The Imperial Hephthalites, based in Bactria, expanded eastwards to the Tarim Basin, westwards to Sogdia and southwards through Afghanistan, but they never went beyond the Hindu-Kush, which was occupied by the Alchon Huns, previously thought to be an extension of the Hephthalites. They were a tribal confederation and included both nomadic and settled urban communities. They formed part of the four major states known collectively as Xyon (Xionites) or Huna, being preceded by the Kidarites and by the Alkhon, and succeeded by the Nezak Huns and by the First Turkic Khaganate. All of these Hunnic peoples have often been controversially linked to the Huns who invaded Eastern Europe during the same period, and/or have been referred to as "Huns", but scholars have reached no consensus about any such connection.

Hunas or Huna (Middle Brahmi script: Hūṇā) was the name given by the ancient Indians to a group of Central Asian tribes who, via the Khyber Pass, entered the Indian subcontinent at the end of the 5th or early 6th century. The Hunas occupied areas as far south as Eran and Kausambi, greatly weakening the Gupta Empire. The Hunas were ultimately defeated by a coalition of Indian princes that included an Indian king Yasodharman and the Gupta emperor, Narasimhagupta. They defeated a Huna army and their ruler Mihirakula in 528 CE and drove them out of India. The Guptas are thought to have played only a minor role in this campaign.

The Hunas are thought to have included the Xionite and/or Hephthalite, the Kidarites, the Alchon Huns (also known as the Alxon, Alakhana, Walxon etc.) and the Nezak Huns. Such names, along with that of the Harahunas (also known as the Halahunas or Harahuras) mentioned in Hindu texts, have sometimes been used for the Hunas in general; while these groups (and the Iranian Huns) appear to have been a component of the Hunas, such names were not necessarily synonymous. Some authors suggest that the Hunas were Hephthalite Huns from Central Asia. The relationship, of the Hunas to the Huns, a Central Asian people who invaded Europe during the same period, is under research.

Harshavardhana (Sanskrit: हर्षवर्धन; 4 June 590 – 647) was an emperor of Kannauj from April 606 until his death in 647. He was the king of Thanesar who had defeated the Alchon Huns, and the younger brother of Rajyavardhana, son of Prabhakaravardhana and last king of Thanesar. He was one of the greatest kings of the Kingdom of Kannauj, which under him expanded into a vast realm in northern India.

At the height of Harsha's power, his realm covered much of northern and northwestern India, with the Narmada River as its southern boundary. He eventually made Kanyakubja (present-day Kannauj, Uttar Pradesh state) his imperial capital, and reigned until 647 CE. Harsha was defeated by the Emperor Pulakeshin II of the Chalukya dynasty in the Battle of Narmada, when he tried to expand his empire into the southern peninsula of India.

Mihirakula (Gupta script: , Mi-hi-ra-ku-la, Chinese: 摩酰逻矩罗 Mo-hi-lo-kiu-lo), sometimes referred to as Mihiragula or Mahiragula, was the second and last Alchon Hun king of northwestern region of the Indian subcontinent between 502 and 530 CE. He was a son of and successor to Toramana of Huna heritage. His father ruled the Indian part of the Hephthalite Empire. Mihirakula ruled from his capital of Sagala (modern-day Sialkot, Pakistan).

In around 520 CE, the Chinese monk Song Yun met with Mihirakula. According to the 7th-century travelogue of the Chinese Buddhist pilgrim and student Xuanzang, Mihirakula ruled several hundreds of years before his visit, was initially interested in Buddhism, and sought a Buddhist teacher from monasteries in his domain. They did not send him a learned Buddhist scholar. Feeling insulted, he became anti-Buddhist and destroyed the monasteries in his kingdom.

Gwalior (Hindi: IPA: [ɡʋɑːlɪjəɾ], pronunciation) is a major city in the central Indian state of Madhya Pradesh. It is known as the Music City of India having the oldest musical gharana in existence. It is a major sports, cultural, industrial, and political centre in Madhya Pradesh. Gwalior is among the seven cities selected for new startup centres under India's growing innovation ecosystem. On World Cities Day (31 October 2023), UNESCO Director - General Audrey Azoulay announced Gwalior's inclusion among 55 new world creative cities in the UCCN from India. This tag elevates Gwalior's identity internationally, spotlighting its artists, music traditions and vibrant culture. It lies in the northern part of Madhya Pradesh and is one of the Counter-magnet cities. Located 313 kilometres (194 mi) south of New Delhi, the capital city of India and 446 kilometres (277 mi) from Bhopal, the state capital, Gwalior occupies a strategic location in the Gwalior Chambal region of India. The grand historic city and its fortress have been ruled by several Indian kingdoms. From the Alchon Huns in the 5th century AD to Gurjara Pratihara dynasty in the 8th century AD. It was passed on to Kachchhapaghatas in the 10th century AD. Later it fell into the hands of the Delhi Sultanate in the 12th century AD, it was then passed on to the Tomars in the 13th century AD who were the vassal rulers of the Delhi Sultanate.

The Mughal Empire conquered the city and its fortress in the 16th century AD. When the Mughal Empire was declining, it fell into the hands of Jat rulers, then to the English in 1730, and last it was passed on to the Scindia Dynasty of Maratha Empire in the early 18th century.

The Nezak Huns (Pahlavi: 𐭭𐭩𐭰𐭪𐭩 nycky), also Nezak Shahs, was a significant principality located south of the Hindu Kush from circa 484 to 665 CE. Despite being traditionally identified as the last of the four Hunnic states in the Indian subcontinent, their ethnicity remains a matter of dispute and is subject to speculation. The primary evidence for the dynasty comes from coins inscribed with a characteristic water-buffalo-head crown and an eponymous legend.

The Nezak Huns rose to power after the Sasanian Empire was defeated by the Hephthalites. Their founder Khingal may have been from a Hunnic group, allied to the Hephthalites, or a local ruler who accepted tributary status. Little is known about the rulers who succeeded him; they received regular diplomatic missions from the Tang dynasty, and some coexisted with the Alchon Huns from about the mid 6th century.

The term Iranian Huns is sometimes used for a group of different tribes that lived in Central Asia, in the historical regions of Transoxiana, Bactria, Tokharistan, Kabul Valley, and Gandhara, overlapping with the modern-day Afghanistan, Tajikistan, Uzbekistan, Eastern Iran, Pakistan, and Northwest India, between the fourth and seventh centuries. They also threatened the Northeast borders of Sasanian Iran and forced the Shahs to lead many ill-documented campaigns against them.

The term was introduced by Robert Göbl in the 1960s and is based on his study of coins. The term "Iranian Huns" coined by Göbl has been sometimes accepted in research, especially in German academia, and reflects how some of the namings and inscriptions of the Kidarites and Hephthalites used an Iranian language, and the bulk of the population they ruled was Iranian. Their origin is controversially discussed. Göbl describes four groups: Kidarites, Alchons, Nezaks, and Hephthalites as the Iranian Huns based on numismatic evidence available at his time. But recent descriptions also put the Xionites as a fifth group. In recent research, it is debated whether the new arrivals came as one wave or several waves of different peoples.