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
Company rule in India to the Dogra Dynasty of Jammu, and thereby became a princely state. In 1854 Berar was annexed, and the state of Oudh two years later. The second form of asserting power involved treaties in which Indian rulers acknowledged the Company's hegemony in return for limited internal autonomy. Since the Company operated under financial constraints, it had to set up "political" underpinnings for its rule. The most important such support came from the "subsidiary alliances" with Indian princes during the first 75 years of Company rule. In the early 19th century, the territories of these princes accounted for two-thirds of India.