Cap Badge - 3rd Canadian Mounted Rifles, Medicine Hat, Alberta The 3rd Regiment CMR was raised on the 15th March in Medicine Hat and Edmonton, Alberta from the 21st Alberta Hussars and 19th Dragoons. 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 its personnel were absorbed by the 1st Battalion and 2nd Battalion, Canadian Mounted Rifles on 31 December 1915. The regiment was subsequently disbanded on 12 August 1917.