15 March 1920: Reorganized as two separate regiments, The Alberta Regiment (now The South Alberta Light Horse) and The Calgary Regiment 15 May 1924: Reorganized as two separate regiments, The Calgary Regiment (now The King's Own Calgary Regiment) and The Calgary Highlanders 1 April 1936: Amalgamated with the 'Headquarters' and 'B Company' of the '13th Machine Gun Battalion, CMGC' retaining its designation. 15 December 1936: Redesignated The Calgary Regiment (Tank) 1 April 1941: Redesignated 14th (Reserve) Army Tank Battalion, (The Calgary Regiment (Tank)) 15 August 1942: Redesignated 14th (Reserve) Army Tank Regiment, (The Calgary Regiment (Tank)) 1 April 1946: Redesignated 14th Armoured Regiment (Calgary Regiment), RCAC 22 July 1946: Redesignated 14th Armoured Regiment (King's Own Calgary Regiment) 4 Feb 1949: Redesignated The King's Own Calgary Regiment (14th Armoured Regiment) 19 May 1958: Redesignated The King's Own Calgary Regiment (RCAC) 13th Machine Gun Battalion, CMGC Originated on 1 June 1919, in Edmonton, Alberta, as the 13th Machine Gun Brigade, CMGC Redesignated on 15 September 1924, as the 13th Machine Gun Battalion, CMGC Amalgamated on 1 April 1936, with The Calgary Regiment Lineage Chart History 1910–1913 The history of The King's Own Calgary Regiment (RCAC) began on 1 April 1910, when its predecessor the 103rd Regiment (Calgary Rifles), an infantry regiment of the Canadian non-permanent militia, was authorized and formed at Calgary, Alberta, Canada, by General Order 38/10. First World War and afterwards, 1914–1920 With the outbreak of the First World War, the regiment was divided into several battalions for overseas service, which the King's Own perpetuate to this day. These battalions included the 50th, 89th and 137th, all of which saw service in Europe and were composed of men from central and southern Alberta. The 50th Battalion (Calgary), CEF, an infantry battalion of the Canadian Expeditionary Force, was authorized on 7 November 1914 and trained in Calgary and Sarcee Camp. The battalion arrived in France on 11 August 1916, where it fought as part of the 10th Canadian Infantry Brigade, 4th Canadian Division in France and Flanders until the end of the war. The battalion took part in the Battle of the Somme in October 1916, the Vimy Ridge in April 1917, and fought during the Battle of Passchendaele. During the Battle of Vimy Ridge, Pte. John George Pattison of the 50th Battalion CEF was awarded the Empire's highest award for gallantry, the Victoria Cross, for his heroic actions on 10