Assam, one of the seven states of the northeastern region of India, has long remained one of the most volatile and sensitive regions in the country because of the problems of insurgency, ethnic conflict, pressure of migration, underdevelopment etc. Bodos, the largest plains tribe of Assam started an armed struggle for a separate state in the mid-1980s. This armed struggle led to ethnic cleansing of the non-Bodos along the north bank of the Brahmaputra.