The Moamoria rebellion (1769–1805) was an 18th-century uprising in Ahom kingdom of present-day Assam that began as power struggle between the Moamorias (Mataks), the adherents of the Mayamara Sattra, and the Ahom kings. This uprising spread widely to other sections of Ahom kingdom including disgruntled elements of the Ahom aristocracy leading to two periods in which the Ahom king lost control of the capital. Retaking the capital was accompanied by a massacre of subjects, leading to a steep depopulation of large tracts. The Ahom king failed to retake the entire kingdom; a portion in the north-east, Bengmara, became known as Matak Rajya ruled by a newly created office called Borsenapati, became a tribute-paying but virtually independent territory.

The Ahom kingdom was a late medieval kingdom in the Brahmaputra Valley that retained its independence for nearly 600 years despite encountering Mughal expansion in Northeast India. Established by Sukaphaa, a Tai prince from Mong Mao, it began as a mong in the upper reaches of the Brahmaputra based on wet rice agriculture. It expanded suddenly under Suhungmung in the 16th century and became multi-ethnic in character, casting a profound effect on the political and social life of the entire Brahmaputra valley. The kingdom became weaker with the rise of the Moamoria rebellion, and subsequently fell to repeated Burmese invasions of Assam. With the defeat of the Burmese after the First Anglo-Burmese War and the Treaty of Yandabo in 1826, control of the kingdom passed into East India Company hands.