Campbell entered the army as an
ensign in the 38th regiment, which his father then commanded, in 1821, joining the regiment in India. He served as
aide-de-camp to his father throughout the first
Burmese War, and on 1 July 1824 he was promoted a Lieutenant, without
purchase, and in 1826 thanked by the governor-general in council for his services. On 11 July 1826 he was promoted to a company and remained in Burmah in a civil capacity until 1829, when he returned to England and joined the
depôt of his regiment. From 1831 to 1837 Campbell acted as aide-de-camp to his father when serving as
Lieutenant-Governor of New Brunswick, and in the latter year he purchased the majority of his regiment. In 1840 he purchased the lieutenant-colonelcy of the 38th, and commanded it continuously in the
Mediterranean, the
West Indies, and
Nova Scotia, until he was selected for the command of a
brigade in the expeditionary force intended for the East in 1854. In 1843 he had succeeded to the baronetcy on the death of his father. On 11 Nov. 1851 he had been promoted
colonel by
brevet, and on 24 March 1854 he was posted to the command of the 2nd brigade of the
3rd division under Major-General
Sir Richard England, with the rank of
Brigadier-General. With that command he was present at the battles of the Alma and
Inkerman, and on 12 December 1854 he was promoted
major-general. After the
Battle of Inkerman as the senior brigadier-general with the army, he was posted to the temporary command of the 4th division. ==Death==