Field Marshal
* 16th of October 1865
† 28th of August 1946
(Grenadiers Guards)
Nickname: Fatty
Nickname: 10th Earl of Cavan
Nickname: Baron Cavan
Nickname: Viscount Kilcoursie
| 1908-02-14 | Lieutenant-Colonel |
| 1911-11-04 | Colonel |
| 1914-08-05 | Temporary Brigadier-General |
| 1915-06-29 | Major-General |
| 1916-01-11 | Temporary Lieutenant-General |
| 1917-01-01 | Lieutenant-General |
| 1918-06-25 | Temporary General |
| 1921-11-02 | General |
| 1932-10-31 | Field Marshal |
| 1908-02-14 | – | 1912-02-14 | Commanding Officer 1st Battalion Grenadiers Guards |
| 1912-02-14 | – | 1913-11-08 | Half-pay |
| 1913-11-08 | Retired | ||
| 1914-08-11 | Recalled | ||
| 1914-08-11 | – | 1914-09-08 | Commanding Officer 2nd London Brigade |
| 1914-09-09 | – | 1915-06-28 | Commanding Officer 4th Guards Brigade [France] |
| 1915-06-29 | – | 1915-08-05 | General Officer Commanding 50th Division [France] |
| 1915-08-06 | – | 1916-01-02 | General Officer Commanding Guards Division [France] |
| 1916-01-11 | – | 1918-03-17 | Genera Officer Commanding XIV Corps [France - Italy] |
| 1918-03-18 | – | 1919-01-20 | General Officer Commanding British Troops in Italy |
| 1920-03-22 | – | 1920-11-28 | Lieutenant of Tower of London |
| 1920-10-01 | – | 1922-04-25 | Aide-de-Camp General to the King |
| 1920-11-02 | – | 1922-02-18 | General Officer Commanding in Chief Aldershot Command |
| 1922-02-19 | – | 1926-02-18 | Chief of the Imperial General Staff |
| 1925-05-23 | – | 1946-08-28 | Colonel, Irish Guards |
| 1928-12-15 | – | 1935-10-15 | Colonel, Bedfordshire & Hertfordshire Regiment |
| 1940-XX-XX | Commanding Officer Hertfordshire Local Defence Volunteers |