 
 <prompt> Wetin happun for di 19th century? Based on di previous question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: With Burma dey busy with the Chinese threat, Ayutthaya recover im territories by 1770, and dem kon capture Lan Na by 1776. Burma and Siam dey fight war reach 1855, but all end for draw, dem swap Tenasserim (go Burma) and Lan Na (go Ayutthaya). Faced with powerful China and resurgent Ayutthaya for east, King Bodawpaya turn west, collect Arakan (1785), Manipur (1814) and Assam (1817). E be di second-largest empire for Burmese history but also one wey get long border wey no clear with British India. 