Eastern Iran includes the provinces North Khorasan, Razavi Khorasan, South Khorasan, and Sistan and Baluchestan some of which share a border with Afghanistan and Pakistan. Some references also count Kerman Province to this region.
Dominated by deserts, this region is characterised by an arid or hyper-arid climate.
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.
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".
Nishapur County (Persian: شهرستان نیشاپور) is in Razavi Khorasan province, Iran. Its capital is the city of Nishapur, the second largest city in the province and the third largest city in Eastern Iran.
Ferula assa-foetida is a species of Ferula endemic to Southern Iran. It is a source of asafoetida, but not the main source, although many sources claim so. The production of asafoetida from this species is confined to Southern Iran, especially the area near Lar.
Outside its native range, other asafoetida-producing species are often misidentified as F. assa-foetida. For example, F. foetida is mistaken for F. assa-foetida in Flora of the U.S.S.R. and Flora of Pakistan. In a molecular phylogenetic study, all the plant samples of F. assa-foetida collected in Central Iran were not the true species, but F. alliacea and F. gabrielii or their close relatives instead. Chemical analyses of asafoetida samples obtained from local markets in Eastern Iran also showed that asafoetida-producing species there were F. lutensis, F. foetida, F. alliacea, etc., instead of F. assa-foetida.