| 1866: |
25th “Elgin Battalion of Infantry”
│ |
| 1900: |
25th Elgin Regiment |
|
│ |
| 1903: |
disbanded
|
| 1904: |
25th Regiment |
|
│ |
|
 |
 |
| 1920: |
1st Battalion
(91st Battalion, CEF), |
2nd Battalion, |
|
The Elgin Regiment |
|
[Non Permanent Active Militia] |
[Reserve] |
|
 |
|
│ |
│ |
| 1936: |
The Elgin Regiment
│ |
disbanded |
|
|
|
| 1940: |
The Elgin Regiment (Reserve)
│
│ |
The Elgin Regiment
[Canadian Active Service Force]
│ |
| 1942: |
│
│
│
25th Armoured Regiment
(The Elgin Regiment)
│ |
|
| 1943: |
│
│
│
│ |
25th Canadian Tank Delivery
Regiment
(The Elgin Regiment)
│ |
| 1944: |
│
│
│
│ |
25th Canadian Armoured
Delivery Regiment
(The Elgin Regiment)
│ |
| 1946: |
The Elgin Regiment
│ |
disbanded |
| 1954: |
The Elgin Regiment
(27th Armoured Regiment) |
|
│ |
| 1958: |
The Elgin Regiment
(RCAC)
│ |
| 1997: |
31 Combat Engineer Regiment
(The Elgin’s) |
|
│ |
|
|
|
Overseas battalion of the Canadian Expeditionary Force
perpetuated by The Elgin Regiment |
| |
|
91st (Elgin) Battalion |
|
 |
| |