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
Colonial India were numerically inferior to the Bengali armed forces. At the Battle of Plassey on 23 June 1757, fought between the British under the command of Robert Clive and the Nawab, Mir Jafar's forces betrayed the Nawab and helped defeat him. Jafar was installed on the throne as a British subservient ruler. The battle transformed British perspective as they realised their strength and potential to conquer smaller Indian kingdoms and marked the beginning of the imperial or colonial era in South Asia. British policy in Asia during the 19th century was chiefly concerned with expanding and protecting its hold on India,