(Chapter I of Narrative of The Burmese War by Major John Snodgrass, British Army, the Military Secretary to the Commander of the British expeditionary force and the Assistant Political Agent in Ava.)
The unprovoked aggressions of the Burmese Governors of Arracan upon the south-east frontier of Bengal, and the contemptuous silence of the court of Ava to every remonstrance upon the subject, in the beginning of 1824, compelled the Indian government to resort to other measures for obtaining redress, and preventing the future encroachments of a warlike and ambitious neighbour, whose arrogant pretensions and restless character had so frequently interrupted the relations of peace subsisting between the two countries, keeping the frontier provinces in constant dread and danger of invasion.
Early in that year orders were given for the equipment of a force of from five to six thousand men at the presidencies of Fort William and Fort St. George: the two divisions were directed to assemble at Port Cornwallis, in the Great Andaman Island, from which the combined forces, under the command of Major-General Sir Archibald Campbell, were to proceed for the capture of Rangoon, the principal sea-port of the Burmhan empire.
Junction of the combined forces from Bengal and Madras at Port Cornwallis
Between the 12th and 17th of April, the Bengal division, consisting of his majesty’s thirteenth and thirty-eighth regiments and two companies of artillery, were embarked at Calcutta, and the transports immediately proceeded to the place of general rendezvous, which they reached about the end of the month, where a detention of some days took place in consequence of the troops from Madras not having arrived.