The 121st (Western Irish) Battalion, CEF was a unit in the Canadian Expeditionary Force during the First World War.
Based in New Westminster, British Columbia, the unit was authorized on 22 December 1915[1] and began recruiting in that city.
The 121st (Western Irish) Battalion, CEF had one Officer Commanding: Lieutenant-Colonel Archibald Woodbury McLelan.
[3] The 121st Battalion is perpetuated by The British Columbia Regiment (Duke of Connaught's Own).
[4] The perpetuation has been passed down through the following units as a result of reorganizations and amalgamations: