Complex sentence: 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.
Split into simpler sentences: He was appointed Commander-in-Chief, Scotland in 1767. He succeeded his father as 5th Duke of Argyll in November 1770 and was promoted to full general on 19 March 1778.