In 1936, the regiment was converted from infantry to artillery to become the 45th Field Battery RCA and now forms part of the 50th Field Artillery Regiment (The Prince of Wales Rangers), RCA (currently on the Supplementary Order of Battle).
These companies would see active service when called out during the Fenian Raids of the late 1860s.
[1][5] On 10 April 1885, the 45th West Durham Battalion of Infantry mobilized a company for active service with The Midland Battalion where it served in the Alberta Column of the North West Field Force.
[2] On 15 March 1920, as a result of the reorganization of the Canadian Militia following the Otter Commission, the 45th Victoria and Haliburton Regiment was redesignated as The Victoria and Haliburton Regiment and was reorganized with two battalions (one of them a paper-only reserve battalion) to perpetuate the assigned war-raised battalions of the Canadian Expeditionary Force.
[1][2][10] On 15 December 1936, as a result of the 1936 militia reorganization, The Victoria and Haliburton Regiment was converted from infantry to artillery and amalgamated with the 45th Medium Battery, RCA, and redesignated as the 45th Field Battery (Howitzer), RCA.