 Gadzira kupfuurira kweiyi ndima - Chibvumirano pakati peHumambo hweSiam neGreat Britain chinowanzozivikanwa seChibvumirano cheBurney chakasainwa muBangkok musi wa20 Chikumi 1826 naHenry Burney, mumiriri weBritish East India Company, weBritain, naMambo Rama III weSiam. Yakatevera chibvumirano chapakuvamba chaFebruary 24, 1826, umo Siam yakava mubatanidzwa weBritain mukurwisana noUmambo hweAva Burma, neBritain yakanga iri muhondo. Hondo yeSiamese yakasimudzwa uye yakashongedzerwa, asi haina kutora chikamu chakakomba muhondo nekuda kwekusafara uye kusahadzika kunobva pakupinda kweSiamese kweKedah muna 1821. 