The British Columbia Regiment (Duke of Connaught's Own Rifles) was called out on service on 26 August 1939 and details of the regiment were placed on active service on 1 September 1939 for local protection duties under the designation The British Columbia Regiment (Duke of Connaught's Own Rifles), CASF (Details). Details from the Irish Fusiliers were called out on service on 26 August 1939 and then on active service on 1 September 1939, as the Irish Fusiliers (Vancouver Regiment), CASF (Details), for local protection duties. The 102nd Battery was called out on service on 26 August 1939 and details of the battery were placed on active service on 1 September 1939 as the 102nd (North British Columbia) Heavy Battery, RCA, CASF (Details), for local protection duties. The details of the three units called out on active service were disbanded on 31 December 1940.