Prince Henry was promoted to captain on 11 May 1927, and was appointed a personal aide-de-camp to his father on 2 August 1929. On 3 March 1931, he was appointed a staff captain and was seconded for service with the 2nd Cavalry Brigade. He was brevetted to major on 2 August 1934, and upon his father's Silver Jubilee the following May, was appointed Colonel-in-Chief of the Gloucestershire Regiment. On 6 July 1935, he was promoted to the substantive rank of major, his final rank as an actively serving officer. On 23 June 1936, he was appointed a personal aide-de-camp to his eldest brother, Edward VIII.