The seventh wave of people into Assam occurred soon after the beginning the colonial period in Assam after the First Anglo-Burmese War and the Treaty of Yandaboo in 1826—the political instability led to the immigration of Kachin and Kuki people from Upper Burma into Assam across the Patkai and Arakan Yoma. They constitute the Singphos in Upper Assam, and the Kuki-Chin tribes in Karbi Anglong and Dima Hasao.