| 1866: | 40th “Northumberland” Battalion │ |
46th “East Durham” Battalion │ |
|||
| 1897: | │ │ |
46th “Durham” Battalion │ |
|||
| 1900: | 40th Northumberland Regiment | 46th Durham Regiment | |||
 │ |
 │ |
||||
 |
 |
|
|
||
| 1920: | 1st Battalion (139th Battalion, CEF), [Non Permanent Active Militia] |
2nd Battalion (235th Battalion, CEF), [Reserve] |
1st Battalion (136th Battalion, CEF), [Non Permanent Active Militia] |
2nd Battalion, [Reserve] |
|
| The Northumberland (Ontario) Regiment | The Durham Regiment | ||||
 |
 |
||||
| │ | │ | │ | │ | ||
| 1926: | 1st Battalion (39th Battalion, CEF), |
2nd Battalion (139th Battalion, CEF), |
│ │ |
│ │ |
|
| The Northumberland (Ontario) Regiment | │ | │ | |||
| │ | │ | │ | │ | ||
| 1936: | │ │ |
disbanded | │ │ |
disbanded | |
|
 |
 |
|
||
| The Midland Regiment (Northumberland and Durham) |
|||||
 │ |
|||||
|
|
|
|||
| 1940: | 2nd (Reserve) Battalion, | 1st Battalion, [Canadian Active Service Force] |
|||
| The Midland Regiment (Northumberland and Durham) |
|||||
| │ | │ | ||||
| 1945: | The Midland Regiment (Northumberland and Durham) │ |
disbanded | |||
| 1946: | The Midland Regiment │ |
||||
| 1954: | merged into The Hastings and Prince Edward Regiment |
||||
| |
|||||
| Overseas battalions of the Canadian Expeditionary Force perpetuated by The Hastings and Prince Edward Regiment |
|||||
| 39th Battalion | 139th (Northumberland) Battalion | 136th (Durham) Battalion | |||
 |
 |
 |
|||