The Treaty of Yandaboo was signed on February 24, 1826 by General Sir Archibald Campbell on the British side, and by Governor of Legaing Maha Min Hla Kyaw Htin from the Burmese side. With the treaty of Yandaboo in 1826, the fate of Assam passed into the hands of theBritish. Now began a history in Assam which was a series of annexation andsecessions. The British annexed Cachar in 1832 and Jaintia Hills in 1835. In 1874,Assam became a separate province with Shillong as its capital. Sylhet was merged with East Bengal on partition of India. It saw further reduction of its area whenDewangiri in North Kamrupa was ceded to Bhutan in 1951.
In 1818, disturbed by repeated invasions from Burma, the Ahom king requested assistance from the British East India Company, which was then based at Calcutta. The British East India Company responded to the request, and fought and defeated the Burmese armies. The war ended with the Treaty of Yandaboo, by which the Burmese agreed to withdraw from Assam and the Ahom king ceded a part of his territory to the British East India Company as a reward. The war gave the East India Company an opportunity to establish rights and interests in the North East, leading to the extinction of the Ahom kingdom in 1838 .
The Treaty of Yandaboo was signed on February 24, 1826 by General Sir Archibald Campbell on the British side, and by Governor of Legaing Maha Min Hla Kyaw Htin from the Burmese side.