evidence: After Indian Independence from British Rule in 1947, the Northeastern region of British India consisted of Assam and the princely states of Tripura Kingdom and Manipur Kingdom. Subsequently, Manipur and Tripura were made Union Territories of India in 1956 and in 1972 attained fully-fledged statehood. Later, Nagaland attained statehood in 1963, Meghalaya in 1972. Arunachal Pradesh and Mizoram became full-fledged states on 20 February 1987, being carved out of the large territory of Assam.[34] Sikkim was integrated as the eighth North Eastern Council state in 2002.[21] [...] [edit]Arunachal Pradesh, a state in the Northeastern tip of India, is claimed by China as South Tibet.[45] Sino-Indian relations degraded, resulting in the Sino-Indian War of 1962. The cause of the escalation into war is still disputed by both Chinese and Indian sources. During the war in 1962, the PRC (China) captured much of the NEFA (North-East Frontier Agency) created by India in 1954. But on 21 November 1962, China declared a unilateral ceasefire, and withdrew its troops 20 kilometres (12 mi) behind the McMahon Line. China returned Indian prisoners of war in 1963.[46] [...] - ^ a b "Arunachal Pradesh". Archived from the original on 3 June 2017. Retrieved 6 June 2017.