Course of the Wars:
(I) A British force was defeated at Ramu, and the first two attempts to reach Ava failed. Martaban and Tennasserin were taken by the British, and the Burmese were expelled from Rangoon in December 1824. Prome was reached in April 1825. Myede was entered in December. In 1826 Sir Archibald Campbell pushed on to Yandabu, forty-five miles from Ava. By the treaty of peace February 24, 1826, the British gained the provinces of Assam, Arakan, and the coast of Tenasserim.
(II) In April, 1852, as the King of Ava refused to come to terms, Rangoon, Martaban, and Bassein were taken by Dalhousie. Prome was taken in October, and Pegu in November 1852. No treaty was signed but the King was prepared to accept an accomplished fact.
(III) In 1885 the British Ultimatum took King Thibaw by surprise, and within a fortnight he surrendered unconditionally when the British force approached his capital. Guerilla warfare continued for nearly two years.