The Monamoti Rebellion, also known as the Momoria Rebellion, was a rebellion that occurred in Assam, India in the early 19th century. Several factors contributed to the causes of this rebellion:

1. Land alienation: The British colonial administration introduced land policies that led to the alienation of traditional tribal lands, leading to discontent among the Momoria and other indigenous groups.

2. Economic Exploitation: Due to the imposition of taxes and revenue collection by the British, there was economic exploitation of the local population, which further increased the resentment.

Cultural and religious factors: The Momoria people had their own distinct cultural and religious practices, and felt threatened by attempts to impose British cultural norms and Christianity on them.

4. Influence of tribal leaders: Influential tribal leaders like Gomdhar Konwar and Kandarpa Konwar played an important role in uniting the Momoria and other tribes against British rule.

5. Lack of basic services: The British failed to provide essential services like health care, education and infrastructure development in the tribal areas, which led to discontent.

6. British interference in traditional institutions: The British administration interfered with traditional tribal institutions and customary laws, leading to the breakdown of social order and traditional governance systems.

7. Socio-political discontent: Momoriya and other tribal communities were excluded from political power and decision-making processes, leading to a sense of marginalization.

8. Resentment against tea plantations: The expansion of tea plantations in Assam often encroaches on tribal lands, leading to conflicts and land disputes.

These various factors combined to ignite the Momoria Rebellion of 1804–1805, during which the Momoria tribes, along with other indigenous groups, rose up against British rule and the socio-economic changes brought about in Assam.