| Date of birth | 1882-08-29 | Townsville, QLD |
| Date and unit at appointment (Officers) |
1903-03-27 |
Commissioned asa second Lieutenant in the 1st Queensland (Moreton) Regiment. |
| Date promoted |
1903-11-27 |
Promoted to first lieutenant. |
| Date promoted |
1904-09-24 |
Promoted to captain. |
| Date promoted |
1911-08-14 |
Promoted to major. |
| Other units |
1912-07-01 |
Transferred to the 8th Infantry (Oxley) Battalion and took command of it. |
| Date promoted |
1914-05-09 |
Promoted to lieutenant colonel. |
| Other units |
1914-08-05 - 1914-08-31 |
Appointed to command the Lytton Defences. |
| Date and unit at appointment (Officers) |
1914-09-23 |
Appointed to the AIF, commanding the 15th Battalion. |
| Date of honour or award |
1915 |
For his part in the Gallipoli campaign, he was made a Companion of the Order of the Bath (CB). |
| Other |
1915-04-25 |
Arrived at Gallipoli in the evening. |
| Other |
1915-08-08 |
Lieutenant Colonel Cannan's brother, Major D H Cannan, killed in the 15th Battalion's attack on the Sari Bair Range. |
| Other |
1915-10 |
Evacuated sick, rejoining the 15th Battalion in Egypt. |
| Other |
1916-06 |
The 15th Battalion moved to France and saw action at Poziers and Mouquet Farm. |
| Other |
1916-08-30 |
Appointed to command the 11th Infantry Brigade. Made Colonel and Temporary Brigadier General. |
| Date promoted |
1917-06-24 |
Made a Brevet Colonel. |
| Date of honour or award |
1918 |
Awarded the Distinguished Service Order (DSO) for the battles of August and September 1918. |
| Date of honour or award |
1918-06-03 |
Companion of the Order of Saint Michael and Saint George (CMG). |
| Other units |
1918-10-01 - 1920-06-30 |
Commanded the 2/15th Infantry Battalion. |
| Date of honour or award |
1919-04-05 |
Belgiam Croix de Guerre. |
| Date returned to Australia |
1919-08-22 |
|
| Other |
1919-12-13 |
Appointment to the AIF terminated. |
| Other |
1920-04-01 - 1923-03-21 |
Aide de Camp to the Govenor General. |
| Date promoted |
1920-07-01 |
Appointed honorary brigadier general. |
| Date promoted |
1920-07-01 |
Promoted to colonel. |
| Other |
1920-07-01 - 1921-05-30 |
Commanded the 2nd Infantry Brigade. |
| Other |
1921-05-01 - 1925-04-30 |
Commanded the 11th Mixed Brigade. |
| Other |
1925-04-30 |
Transferred to the unattached list. |
| Other |
1940-05-27 |
Appointed Inspector General of Administration at the Department of Defence. |
| Date promoted |
1940-07-07 |
Appointed temporary major general and took over command of the 2nd Division. |
| Other |
1940-10-24 |
Became Quartermaster General and appointed a member of the Military Board. |
| Other |
1943-09 |
General Thomas Blamey nominated Cannan for a Knight of the British Empire (KBE) but it was refused. |
| Other |
1946 - 1947 |
Director of the United Nations Relief and Rehabillitation Administration in the South West Pacific. |
| Other |
1948 - 1957 |
Director of the Services Canteen Trust. |
| Other |
1950 - 1951 |
Director of the Queensland division of the Australian Red Cross Society. |
| Date of death | 1976-05-23 | |