This text covers an important period in the history of modern northeast India, from the Treaty of Yandabo in 1826 that marked the beginning of British expansion in the region, till Partition in 1947. It discusses the history of the colonial province of Assam, which included most of modern Assam, Meghalaya, Nagaland, Mizoram and Arunachal Pradesh. It details the colonial expansion and associated political developments and also analyses the important social, cultural and economic changes during the period. A key aspect is its focus on the growth of political consciousness in the region and the impact of the pan-Indian national movement on the society and politics of the region.