In the Great War the regiment was not mobilized, but in December 1914 many volunteers from the regiment joined the newly formed 2nd Regiment Canadian Mounted Rifles. After some limited service in France as cavalry, the unit was reroled to infantry as 2nd Canadian Mounted Rifles Battalion on January 1, 1916. The battalion became part of the 8th Canadian Infantry Brigade, and fought with great luck and success on the Western Front. Despite being trained as cavalry but deployed as infantry, the regiment managed the war well. Captain "Jock" MacGregor was awarded the Victoria Cross for actions taken in the battle at Cambrai on September 29, 1918. The actions and awards of the 2nd Canadian Mounted Rifles are perpetuated today by the British Columbia Dragoons, their direct descendants.