Northeast India when they became relatively isolated from traditional trading partners such as Bhutan and Myanmar. Many of the peoples in present-day Mizoram, Meghalaya and Nagaland converted to Christianity under the influence of British (Welsh) missionaries. In the early 19th century, both the Ahom and the Manipur kingdoms fell to a Burmese invasion. The ensuing First Anglo-Burmese War resulted in the entire region coming under British control. In the colonial period (1826–1947), North East India was made a part of Bengal Province from 1839 to 1873, when Assam became its own province. After Indian Independence from British Rule in 1947, the Northeastern
Presidencies and provinces of British India joined Pakistan, and 3 (Punjab, Bengal and Assam) were partitioned between India and Pakistan. In 1950, after the new Indian Constitution was adopted, the provinces in India were replaced by redrawn states and union territories. Pakistan, however, retained its five provinces, one of which, East Bengal, was renamed East Pakistan in 1956 and became the independent nation of Bangladesh in 1971. Presidencies and provinces of British India The Provinces of India, earlier Presidencies of India and still earlier, Presidency towns, were the administrative divisions of British governance in the subcontinent. Collectively, they were called British India. In one form or