found: Britannica online, viewed June 6, 2018Ahom (tribe that ruled much of Assam from the 13th century until the establishment of British rule in 1838. Their power in Assam reached its peak during the reign of King Rudra Singh (1696--1714). They originated in the Chinese province of Yunnan and began migrating into Indochina and northern Myanmar (Burma) in the first centuries ad.) Assam (in 1926 Assam became part of British India; in 1838 the area was incorporated into British-administered Bengal)