The 33rd Medium Artillery Regiment, Royal Canadian Artillery was an artillery regiment of the Canadian Army Reserve based in Cobourg, Ontario. In 1965, the regiment was reduced to nil strength and placed on the Supplementary Order of Battle.[1][2]
On 10 April 1885, the 47th Frontenac Battalion of Infantry mobilized a company for active service that served as part of the Midland Battalion in the Alberta Column of the North West Field Force. On 24 July 1885, the company was removed from active service.[2]
On 6 August 1914, the Cobourg Heavy Battery was placed on active service and during the fall of 1914, the battery served in Lévis, Quebec, and Vancouver, British Columbia, providing coastal artillery support.[2]
On 7 November 1914, The 2nd Heavy Battery, CGA, CEF, was authorized and on 15 June 1915, the battery embarked for Great Britain. On 16 September 1915, the battery disembarked in France where it provided heavy artillery support as part of the 2nd Brigade, CGA, CEF in France and Flanders until the end of the war. On 23 October 1920, the battery was disbanded.[2]
On 22 December 1915, The 146th Battalion, CEF was authorized, and on 25 September 1916, the battalion embarked for Great Britain. After its arrival in the UK, on 7 October 1916, the battalion's personnel were absorbed by the 95th Battalion, CEF, where it provided reinforcements for the Canadian Corps in the field. On 17 July 1917, The 146th Battalion, CEF was disbanded.[2]