| 1866: |
27th Lambton Battalion of Infantry
│ |
| 1872: |
27th Lambton Battalion of Infantry “St. Clair Borderers”
│ |
| 1900: |
27th Lambton Regiment
“St. Clair Borderers” |
|
│ |
|
 |
 |
| 1920: |
1st Battalion
(149th Battalion, CEF), |
2nd Battalion
(70th Battalion, CEF), |
| 1920: |
The Lambton Regiment |
|
[Non Permanent Active Militia] |
[Reserve] |
|
 |
|
│ |
│ |
| 1936: |
disbanded |
disbanded |
|
|
|
Overseas battalion of the Canadian Expeditionary Force
perpetuated by The Lambton Regiment (disbanded) |
| |
|
149th Battalion
(Lambtons) |
70th Battalion |
|
 |
 |
| |