Northeastern India contains the state of Arunachal Pradesh. It was created from the former North-East Frontier Agency (NEFA) region, and on February 20, 1987, it was admitted as a state. To the south, it shares a border with the states of Assam and Nagaland. It shares international borders at the McMahon Line with China in the north, Bhutan in the west, Myanmar in the east, and a disputed boundary with Bhutan in the north. The state capital of Arunachal Pradesh is Itanagar. By area, Arunachal Pradesh is the largest of Northeast India's Seven Sister States. The 1,129 km border between Arunachal Pradesh and the Tibet Autonomous Region of China. Arunachal Pradesh had 1,382,611 people living there as per the 2011 India Census, and it covered an area of 83,743 square kilometers (32,333 sq mi). It is a state with a variety of ethnic groups, with the majority of them being Monpa in the west, Tani in the center, Mishmi and Tai in the east, and Naga in the southeast. The state is home to about 26 major tribes and 100 minor tribes. [Reference needed] Adi, Nyshi, Singpho, Galo, Tagin, Apatani, and other major tribes make up the state. Idu-Mishmi, Digaru-Mishmi, and Miju-Mishmi are the three sub-tribes that make up the Mishmi tribe. Both the People's Republic of China and the Republic of China both claim a significant portion of the state as being a part of South Tibet.
