He was appointed Commander-in-Chief, Scotland in 1767, succeeded his father as 5th Duke of Argyll in November 1770 and was promoted to full general on 19 March 1778.
He was appointed Commander-in-Chief of Argyll in November 1770. This Chief was succeeded his father as 5th Duke. He was promoted to full general on 19 March 1778. Commander-in-Chief was Scotland in 1767.