| 199th Battalion, CEF | |
|---|---|
 Recruitment poster, circa 1915 | |
| Active | 1916–1917 |
| Disbanded | 1917 |
| Country | Canada |
| Branch | Canadian Expeditionary Force |
| Type | Infantry |
| Garrison/HQ | Montreal |
| Motto(s) | Latin: Quis separabit?, lit. 'Who shall separate us?' |
| Theatre of war honour | The Great War, 1916–17 |
The 199th (Duchess of Connaught's Own Irish Rangers) Battalion, CEF was a unit in the Canadian Expeditionary Force (CEF) during the First World War.