Complex sentence: He had already been promoted to the substantive rank of lieutenant-general on 28 June 1838, he put down a second revolt in November 1838 and was confirmed as Governor General of British North America on 14 December 1838.
Split into simpler sentences: He had already been promoted to the substantive rank of lieutenant-general on 28 June 1838. He put down a second revolt in November 1838 and was confirmed as Governor General of British North America on 14 December 1838.