The treaty of Yandabo was signed in 1826. The Treaty of Yandabo was signed on February 24, 1826, at Yandabo, concluding the First Anglo-Burmese War (1824-1826). This treaty forced the Burmese to cede territories like Assam, Manipur, Arakan, and Tenasserim to the British, recognize British sovereignty over Cachar and Jaintia, and pay a large indemnity.