Northeast India is the eastern-most region of India connected to East India via a narrow corridor squeezed between Nepal and Bangladesh. It comprises the contiguous Seven Sister States (Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, and Tripura), plus the Himalayan state of Sikkim. Except for the Goalpara region of Assam, the rest were late entrants to the British India, the Brahmaputra valley area of Assam became a part of British India in 1824, and the hill regions were incorporated even later.
Sikkim was annexed to the Indian union through a referendum in 1975 and was recognised as part of Northeast India in the 1990s.In terms of geographical size, Northeast India constitute about 8% of the total India's size, and is roughly 3/4th the size of the state of Maharashtra. Northeast India's population (all 8 states combined) is approximately 40 million (2011 census), which represents 3.1% of the total Indian population (1,210 million). Northeast India's population size is roughly equal to the state of Odisha. The Siliguri Corridor in West Bengal, with a width of 21 to 40 kilometres (13 to 25 mi), connects the North Eastern region with the main part of India. The region SHARES more than 4,500 kilometres (2,800 mi) of international border (about 90 per cent of its entire border area) with China (South Tibet) in the north, Myanmar in the east, Bangladesh in the southwest, and Bhutan to the northwest In the early 19th century, both the Ahom and the Manipur kingdoms fell to a Burmese invasion.
Northeast India constitutes a single linguistic region with about 220 languages in multiple language families (Indo-European, Sino-Tibetan, Tai–Kadai, Austroasiatic) that SHARE common structural features. Assamese, an Indo-Aryan language spoken mostly in the Brahmaputra Valley, developed as a lingua franca for many speech communities. Assamese-based pidgin/creoles have developed in Nagaland (Nagamese) and Arunachal (Nefamese),[38] though their use has been on a decline in recent times. The Austro-Asiatic family is represented by the Khasi, Jaintia and War languages of Meghalaya. A small number of Tai–Kadai languages (Ahom, Tai Phake, Khamti, etc.) are also spoken. Sino-Tibetan is represented by a number of languages that differ significantly from each other, some of which are: Bodo, Rabha, Karbi, Mising, Tiwa, Deuri etc. (Assam); Garo, (Meghalaya) Ao, Tangkhul, Angami, Sema, Lotha, Konyak etc.(Nagaland); Mizo, Hmar,Chakma (Mizoram); Hrusso, Tanee, Nisi, Adi, Abor, Nocte, Apatani, Misimi etc. (Arunachal).
Manipuri is the official language in Manipur, the dominant language of the Imphal Valley; while Naga languages such as Mao, Maram and Tangkul, and Kuki languages such as Hmar and Paite predominate in individual hill areas of the state. Among other Indo-Aryan languages, Sylheti is spoken in South Assam in the Barak Valley. Besides the Sino-Tibetan Tripuri language, Bengali is a majority language in Tripura. Nepali, an Indo-Aryan language, is dominant in Sikkim, besides the Sino-Tibetan languages Limbu, Bhutia and Lepcha. Bengali was the official language of Colonial Assam for about forty years from the 1830s.Northeast India has over 220 ethnic groups and equal number of dialects. The hills states in the region like Arunachal Pradesh, Meghalaya, Mizoram and Nagaland are predominantly inhabited by tribal people with a degree of diversity even within the tribal groups. Besides the indigenous inhabitants people from Tibet, Burma, Thailand, West Bengal and Bangladesh have migrated into the region at various periods of history. Adivasi, Assamese, Bhutia, Bishnupriya Manipuri, Biate, Bodo , Chakma, Chhetri, Dimasa, Garo, Gurung, Hajong, Hmar, Hrankhwl, Jamatia , Karbi, Khasi, Khampti, Koch, Kom, Kuki, Paite, Vaiphei, Zou, Teddim, Simte, Gangte Lepcha, Lushai, Meitei, Mishing, Mizo, Naga, Nepali, Noatia , Paite, Pnar, Purvottar maithili, Rabha, Reang, Singpho, Sylheti, various Tibetan tribes, Tamang, Tiwa, Tripuri, Zeme Naga, Chorei and Limbu are different ethnic groups inhabiting the region.
The economy is agrarian. Little land is available for settled agriculture. Along with settled agriculture, jhum (slash-and-burn) cultivation is still practised by a few indigenous groups of people. The inaccessible terrain and internal disturbances has made rapid industrialisation difficult in the region. In the 21st century, there has been recognition among policy makers and economists of the region that the main stumbling block for economic development of the Northeastern region is the disadvantageous geographical location.[40] It was argued that globalisation propagates deterritorialisation and a borderless world which is often associated with economic integration. With 98 percent of its borders with China, Myanmar, Bhutan, Bangladesh and Nepal, Northeast India appears to have a better scope for development in the era of globalisation. As a result, a new policy developed among intellectuals and politicians that one direction the Northeastern region must be looking to as a new way of development lies with political integration with the rest of India and economic integration with the rest of Asia, with East and Southeast Asia in particular, as the policy of economic integration with the rest of India did not yield much dividends. With the development of this new policy the Government of India directed its Look East policy towards developing the Northeastern region. This policy is reflected in the Year End Review 2004 of the Ministry of External Affairs, which stated that: “India’s Look East Policy has now been given a new dimension by the UPA Government. India is now looking towards a partnership with the ASEAN countries, both within BIMSTEC and the India-ASEAN Summit dialogue as integrally linked to economic and security interests, particularly for India’s East and North East region.”