East India covers Indian states of West Bengal, Bihar, Jharkhand, Odisha and also the union territory Andaman and Nicobar Islands.
The bulk of the region lies on the east coast of India by the Bay of Bengal, and on the Indo-Gangetic plain. Jharkhand, on the Chhota Nagpur plateau, is a hilly and a heavily forested state rich in mineral wealth.
The region was the historical centre of the Nanda, Mahameghavahana dynasty Maurya, Kharavela, Sunga, Kalinga, Eastern Ganga dynasty, Shishunaga dynasty, Gupta and Pala empires that ruled much of the Indian sub-continent at their prime. In medieval India, it was incorporated into the Mughal, Maratha and then the British empire.
The region lies in the humid-subtropical zone, and experiences hot summers from March to June, the monsoon from July to October and mild winters from November to February.
Though Odissi is the only classical dance in eastern India, there are plenty of many folk dances in east India, with the best-known being Ghumura Dance, Sambalpuri and Chhau dance etc.
Santiniketan, established by the Rabindranath Tagore, whose vision became what is now a university town (Visva-Bharati University) that attracts thousands of visitors each year.
North East India
Northeast India is the eastern-most region of India connected to East India via a narrow corridor squeezed between Bhutan and Bangladesh. It comprises the contiguous Seven Sister States (Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, and Tripura), plus the Himalayan state of Sikkim.
The earliest settlers were Austro-Asiatic speakers, followed by Tibeto-Burmese and then by Indo-Aryans. Due to the bio- and crop diversity of the region the focus of current archaeological research has been on domestication of several important plants by early settlers. Writers have suspected an early trade route via Northeast India in the references of Chinese explorer, Zhang Qian made in 100 BC. The Periplus of the Erythraean Sea mention a people called Sêsatai in the region, who were the source of malabathron, prized in the old world.
Diversified geographical conditions of the Eastern part on India caused some unique, exceptional and diverse flora and fauna in East India. In fact, some of the endangered species of the world are found only in the jungles of East India. WWF has identified the following priority ecoregions in North-East India:
Brahmaputra Valley Semi Evergreen Forests
The Eastern Himalayan Broadleaved Forests
The Eastern Himalayan Sub-alpine Coniferous Forests
India–Myanmar Pine Forests