The war being now over, Dalhousie, without waiting for instructions from home, annexed the Punjab, and made provision for the custody and education of the infant maharaja. For the present the province was administered by a triumvirate under the personal supervision of the governor-general, and later, a place having been found for Henry Lawrence in Rajputana, by John Lawrence as sole commissioner. Twice did Dalhousie tour through its length and breadth, settling on the spot all matters of importance, and when he left India no province could show a better record of progress.
One further addition to the empire was made by conquest. The arrogant Burmese court at Ava was bound by the treaty of Yandabo, 1826, to protect British ships in Burmese waters, but the outrageous conduct of the governor of Rangoon towards the masters of the "Monarch" and "Champion" met with no redress from the king. Dalhousie adopted the maxim of Lord Wellesley "that an insult offered to the British flag at the mouth of the Ganges should be resented as promptly and fully as an insult offered at the mouth of the Thames"; but, anxious to save the cost of war, he tried to settle the dispute by diplomacy. When that failed he made vigorous preparation for the campaign to be undertaken in the autumn, giving his attention to the adequate provision of rations, boat transport, and medical supplies, composing differences between the military contingents from Bengal and Madras, and between the military and naval forces employed, and conferring with General Godwin whom he had chosen to command the expedition. Martaban was taken on the 5th of April 1852, and Rangoon and Bassein shortly afterwards. Since, however, the court of Ava showed no sign of submission, the second campaign opened in October, and after the capture of Prome and Pegu the annexation of the province of Pegu was declared by a proclamation dated the 20th of December 1853. To any further invasion of the Burmese empire Dalhousie was firmly opposed, being content to "consolidate" the Company's possessions by uniting Arakan to Tenasserim. By his wise policy he pacified the new province, placing Colonel Arthur Phayre in sole charge of it, personally visiting it, and establishing a complete system of telegraphs and communications.