<P> After Indian Independence from British Rule in 1947, the Northeastern region of British India consisted of Assam and the princely states of Manipur and Tripura . Subsequently, Nagaland in 1963, Meghalaya in 1972, Arunachal Pradesh in 1975 (capital changed to Itanagar) (formed on 20 February 1987) and Mizoram in 1987 were formed out of the large territory of Assam . Manipur and Tripura remained as Union Territories of India between 1956 until 1972, when they attained fully - fledged statehood . Sikkim was integrated as the eighth North Eastern Council state in 2002 . </P> <P> The city of Shillong served as the capital of the Assam province created during British Rule . It remained as the capital of undivided Assam until formation of the state of Meghalaya in 1972 . The capital of Assam was shifted to Dispur, a part of Guwahati, and Shillong was designated as the capital of Meghalaya . </P> <Table> <Tr> <Th> State </Th> <Th> Historic Name </Th> <Th> Capital (s) </Th> <Th> Statehood </Th> </Tr> <Tr> <Td> Arunachal Pradesh </Td> <Td> North - East Frontier Agency </Td> <Td> Itanagar </Td> <Td> 1987 (earlier a Union Territory of India, constituted in 1971) </Td> </Tr> <Tr> <Td> Assam </Td> <Td> Pragjyotisha, Kamarupa </Td> <Td> Shillong (till 1969), Dispur </Td> <Td> 1947 </Td> </Tr> <Tr> <Td> Manipur </Td> <Td> Kangleipak </Td> <Td> Imphal </Td> <Td> 1971 (earlier a Union Territory of India, constituted in 1956) </Td> </Tr> <Tr> <Td> Meghalaya </Td> <Td> Khasi hills, Jaintia hills and Garo hills </Td> <Td> Shillong </Td> <Td> 1971 </Td> </Tr> <Tr> <Td> Mizoram </Td> <Td> Lushai hills </Td> <Td> Aizawl </Td> <Td> 1987 (earlier a Union Territory of India, constituted in 1971) </Td> </Tr> <Tr> <Td> Nagaland </Td> <Td> Naga hills </Td> <Td> Kohima </Td> <Td> 1963 </Td> </Tr> <Tr> <Td> Sikkim </Td> <Td> Sukhim </Td> <Td> Gangtok </Td> <Td> </Td> </Tr> <Tr> <Td> Tripura </Td> <Td> Tipperah </Td> <Td> Agartala </Td> <Td> 1971 (earlier a Union Territory of India, constituted in 1956) </Td> </Tr> </Table> <Tr> <Th> State </Th> <Th> Historic Name </Th> <Th> Capital (s) </Th> <Th> Statehood </Th> </Tr>

The states of manipur tripura and meghalaya were formed in