 It fought in France from 12 February 1915 until the end of the war and was disbanded on 6 November 1920.The 3rd Regiment, Canadian Mounted Rifles, CEF, was authorized on 7 November 1914, embarked for England on 12 June 1915 and fought in France as from 22 September 1915 as part of the 1st Canadian Mounted Rifles Brigade until absorbed by the 1st Battalion and 2nd Battalion, Canadian Mounted Rifles on 31 December 1915.The regiment was subsequently disbanded on 12 August 1917.