Colonel Alexander Campbell of Possil (see Carter-Campbell of Possil) (1754–1849) entered the army as an ensign in the 42nd Regiment in April 1769, and obtained a lieutenancy in the 2nd Battalion Royals the following year in Menorca. He moved to the 62nd regiment later that year in Ireland and went with the regiment to Canada, where, as a captain of light infantry under General Carleton, he fought in the campaigns of 1776 and 1777 with General Burgoyne in the American War of Independence.