From 1939 to 1940, Henry served in France as a liaison officer to Lord Gort. He performed military and diplomatic duties during the rest of the war, then in 1945 was appointed as Australia's governor-general at the request of Prime Minister John Curtin. The post had originally been offered to his younger brother, the Duke of Kent, who died in an air crash. Henry attended the coronation of his niece Queen Elizabeth II in 1953 and carried out several overseas tours, often accompanied by his wife. From 1965, he became incapacitated by a number of strokes. Upon his death, he was succeeded as the Duke of Gloucester by his only living son, Richard.