British rule in the Lushai Hills
British rule in the Lushai Hills, spanning from the late 1889 to the 1947, commenced with the Chin-Lushai Expedition of 1889–90 leading to the formal establishment of the two administrative districts (North Lushai Hills, South Lushai Hills) in 1889 and continued through the integration of the regions into the province of Assam with both districts being merged as the Lushai Hills until India gained independence in 1947. After the Chin–Lushai Expedition of 1889–90, South Lushai Hills was occupied in 1889, and the following year, it was formally annexed, becoming part of Bengal Presidency.
Source: Wikipedia — British rule in the Lushai Hills (CC BY-SA 4.0)