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This is a listing of the regiments in existence in 1921, and the major changes in designation that occurred between then and the major re-organization of the armed forces in 1936.

Permanent Active Militia (Permanent Force)

Designation as of 1 Jan 1921	Changes made before 1 Jan 1937
The Royal Canadian Regiment	nil
Princess Patricia's Canadian Light Infantry	nil
22nd Regiment	Redesignated Royal 22e Regiment 1 Jun 1921.

Non-Permanent Active Militia

Designation as of 1 Jan 1921	Changes made before 1 Jan 1937
The Governor General's Foot Guards	nil
The Canadian Grenadier Guards	nil
The Queens Own Rifles of Canada	nil
The Victoria Rifles of Canada	On 15 Nov 1934, the word "the" was dropped, and the regiment became known as Victoria Rifles of Canada
Les Chasseurs Canadiens	Disbanded 15 Dec 1936
The Royal Highlanders of Canada	Redesignated The Black Watch (Royal Highlanders) 1 Jan 1930 Redesignated The Black Watch (Royal Highland Regiment) of Canada 1 Jul 1935
1st British Columbia Regiment (Duke of Connaught's Own)	Reorganized into three regiments 15 May 1924: The Vancouver Regiment, the Westminster Regiment and the 1st British Columbia Regiment (Duke of Connaught's Own). Redesignated The British Columbia Regiment (Duke of Connaught's Own Rifles) 15 Jan 1930
The Western Ontario Regiment	Redesignated The Canadian Fusiliers (City of London Regiment) 1 Aug 1924 Redesignated The Canadian Fusiliers (City of London Regiment)(MG) 15 Dec 1936
The Royal Rifles of Canada	nil
Les Voltigeurs de Quebec	nil
The Royal Grenadiers	Amalgamated with The Toronto Regiment to form The Royal Regiment of Toronto Grenadiers 15 Dec 1936
The Irish Fusiliers of Canada	Amalgamated with The Vancouver Regiment 1 Jun 1936 to become The Irish Fusiliers of Canada (Vancouver Regiment)
The York Rangers	Amalgamated with The Queen's Rangers (1st American Regiment) 15 Dec 1936 to become The Queen's York Rangers (1st American Regiment) (MG)
The Royal Hamilton Regiment	Redesignated The Royal Hamilton Light Infantry 15 Mar 1927 Amalgamated with The Wentworth Regiment to create The Royal Hamilton Light Infantry (Wentworth Regiment) 15 Dec 1936
The Kingston Regiment (Princess of Wales' Own)	Redesignated The Princess of Wales' Own Regiment 1 Apr 1921 Redesignated The Princess of Wales' Own Regiment (MG) 15 Dec 1936
The Argyll Light Infantry	Redesignated The Argyll Light Infantry (Tank) 15 Dec 1936
Le Regiment de Levis	nil
Les Franc-tireurs du Saguenay	nil
The Lincoln Regiment	Amalgamated with The Lincoln and Welland Regiment 15 Dec 1936; name remained The Lincoln and Welland Regiment
The Halton Rifles	Redesignated The Lorne Rifles (Scottish) 1 Nov 1931 Amalgamated with The Peel and Dufferin Regiment 15 Dec 1936 to become The Lorne Scots (Peel, Dufferin and Halton Regiment)
The Essex Fusiliers	Redesignated The Essex Scottish 15 Jul 1927
The Oxford Rifles	nil
23rd Regiment, Northern Fusiliers	Redesignated The Northern Pioneers 15 Apr 1921 Amalgamated with The Algonquin Regiment 15 Dec 1936
The Kent Regiment	Amalgamated with B Coy 2 MG Bn to become The Kent Regiment (MG) 15 Dec 1936
The Elgin Regiment	nil
The Middlesex Light Infantry	Amalgamated with The Huron Regiment to become The Middlesex and Huron Regiment 1 Sep 1936
The Lambton Regiment	Disbanded and converted to artillery 15 Dec 1936
The Perth Regiment	Redesignated The Perth Regiment (MG) 15 Dec 1936
The Highland Light Infantry of Canada	nil
The Wellington Rifles	Redesignated The Wellington Regiment 15 Feb 1931 Disbanded 14 Dec 1936
The Grey Regiment	Amalgamated with The Simcoe Foresters to become The Grey and Simcoe Foresters 15 Dec 1936
The Bruce Regiment	Disbanded 15 Dec 1936
The Huron Regiment	Amalgamated with The Middlesex Light Infantry to become The Middlesex and Huron Regiment 1 Sep 1936
The Ontario Regiment	Redesignated The Ontario Regiment (Tank) 15 Dec 1936
The Simcoe Foresters	Amalgamated with The Grey Regiment to become The Grey and Simcoe Foresters 15 Dec 1936.
The Peel Regiment	Redesignated The Peel and Dufferin Regiment 15 Apr 1923 Amalgamated with The Lorne Rifles (Scottish) 15 Dec 1936 to become The Lorne Scots (Peel, Dufferin and Halton Regiment)
The Haldimand Rifles	Amalgamated with The Dufferin Rifles of Canada and C Coy 3 MG Bn to become The Dufferin and Haldimand Rifles of Canada 15 Dec 1936
The Dufferin Rifles of Canada	Amalgamated with The Haldimand Rifles and C Coy 3 MG Bn to become The Dufferin and Haldimand Rifles of Canada 15 Dec 1936
The Norfolk Rifles	Redesignated The Norfolk Regiment 14 Nov 1928 Disbanded 14 Dec 1936
The Northumberland (Ontario) Regiment	Redesignated The Northumberland Regiment 15 May 1924 Amalgamated with The Durham Regiment to become The Midland Regiment (Northumberland and Durham) 15 Dec 1936
The Brockville Rifles	nil
The Lanark and Renfrew Regiment	Redesignated The Lanark and Renfrew Scottish Regiment 15 Jul 1927
The Ottawa Regiment (Duke of Cornwall's Own)	Redesignated The Ottawa Highlanders 15 Sep 1922 Redesignated The Cameron Highlanders of Ottawa 10 Aug 1933 Amalgamated with B Coy 4th MG Bn to become The Cameron Highlanders of Ottawa (MG) 15 Dec 1936
The Lincoln and Welland Regiment	Amalgamated with The Lincoln Regiment 15 Dec 1936; name remained The Lincoln and Welland Regiment
The Victoria and Halliburton Regiment	Disbanded 14 Feb 1936 and reorganized as artillery unit
The Durham Regiment	Amalgamated with The Northumberland Regiment to become The Midland Regiment (Northumberland and Durham) 15 Dec 1936
The Frontenac Regiment	HQ and B companies converted to artillery, A Company amalgamated with The Princess of Wales' Own Regiment (MG) 15 Dec 1936.
The 48th Regiment (Highlanders)	Redesignated 48th Highlanders of Canada 1 Aug 1930
The Hastings and Prince Edward Regiment	nil
The Soo Rifles	Redesignated The Sault Ste. Marie Regiment 3 Jul 1923 Amalgamated with A Coy The Algonquin Regiment 15 Dec 1936 to become The Sault Ste. Marie and Sudbury Regiment (MG)
The Sherbrooke Regiment	Redesignated The Sherbrooke Regiment (MG) 15 Dec 1936
Les Carabiniers de Sherbrooke	Redesignated Les Fusiliers de Sherbrooke 15 Jan 1933
The Irish Canadian Rangers	Disbanded 1 Feb 1936
The Grenville Regiment (Lisgar Rifles)	Disbanded and converted to artillery 15 Dec 1936
The Peterborough Rangers	Amalgamated with 3rd Prince of Wales Dragoons and HQ and C Coys 4 MG Bn to become The Prince of Wales Rangers (Peterbororugh Regiment)(MG) 15 Dec 1936
The Royal Montreal Regiment	Redesignated The Royal Montreal Regiment (MG) 15 Dec 1936
The Stormont and Glengarry Regiment	Redesignated The Stormont, Dundas and Glengarry Highlanders 15 Feb 1922
Le Regiment Montmagmy	nil
The St. John Fusiliers	Redesignated The St. John Fusiliers (MG) 15 Dec 1936
The Halifax Rifles	nil
64th Chateauguay and Beauharnois Regiment	Redesignated Le Regiment de Chateauguay 15 Apr 1921 Redesignated Le Regiment de Chateauguay (Mit) 15 Dec 1936
65th Regiment (Carabiniers Mont-Royal)	Redesignated Les Fusiliers Mont Royal 15 Apr 1931
The Princess Louise Fusiliers	Redesignated The Princess Louise Fusiliers (MG) 1 Dec 1936
The Carleton Light Infantry	Amalgamated with The York Regiment to become The Carleton and York Regiment 12 Dec 1936
68th Regiment	Converted to artillery 1936
The Annapolis Regiment	Amalgamated with The Lunenburg Regiment to become The West Nova Scotia Regiment 15 Dec 1936
The Hull Regiment	Redesignated Le Regiment de Hull 1 Mar 1923
The York Regiment	Amalgamated with The Carleton Light Infantry to become The Carleton and York Regiment 12 Dec 1936
The Seaforth Highlanders of Canada	nil
The Northumberland (New Brunswick) Regiment	Redesignated The North Shore (New Brunswick) Regiment 1 Apr 1922
The New Brunswick Rangers	nil
The Lunenburg Regiment	Amalgamated with The Annapolis Regiment to become The West Nova Scotia Regiment 15 Dec 1936
The Wentworth Regiment	Amalgamated with The Royal Hamilton Light Infantry to create The Royal Hamilton Light Infantry (Wentworth Regiment) 15 Dec 1936
The Pictou Highlanders	nil
The Cameron Highlanders of Canada	Redesignated The Queen's Own Cameron Highlanders of Canada 1 Nov 1923
The Colchester and Hants Regiment	Amalgamated with The Cumberland Highlanders and C Coy 6th MG Battalion 1 Dec 1936 to become The North Nova Scotia Highlanders (MG)
The Prince Edward Island Regiment	Redesignated The Prince Edward Island Highlanders 15 Jun 1927
Regiment de Joliette	nil
Le Regiment de St. Hyacinthe	nil
Le Regiment de Maisonneuve	nil
The Three Rivers Regiment	Redesignated The Three Rivers Regiment (Tank) 15 Dec 1936
Le Regiment de Quebec	Redesignated Le Regiment de Quebec (Mit) 15 Dec 1936
1st Battalion The Canadian Scottish Regiment	nil
2nd Battalion, The Canadian Scottish Regiment	Designated 2nd Battalion, The Canadian Scottish Regiment (MG) 15 Dec 1936
Les Fusiliers du St. Laurent	Redesignated Fusiliers du St. Laurent 1 May 1922
The Winnipeg Rifles	Redesignated The Royal Winnipeg Rifles 3 Jun 1935
The Arygll and Sutherland Highlanders of Canada	Redesignated The Arygll and Sutherland Highlanders of Canada (Princess Louise's) 15 Jun 1927 Amalgamated with HQ, A and B Coys 3 MG Bn to become The Arygll and Sutherland Highlanders of Canada (Princess Louise's) (MG) 15 Dec 1936
Le Régiment de Dorchester	Redesignated The Beauce Regiment 1 Jan 1921 Redesignated Le Régiment de Dorchester et Beauce 1 Feb 1932 Redesignated Le Régiment de la Chaudière (Mitrailleuses) 15 Dec 1936
The Cumberland Regiment	Redesignated The Cumberland Highlanders 16 Jun 1927 Amalgamated with Colcehester and Hants Regiment and C Coy 6th MG Battalion 1 Dec 1936 to become The North Nova Scotia Highlanders (MG)
The Cape Breton Highlanders	nil
The South Saskatchewan Regiment	1st and 6th Battalions designated The Regina Rifle Regiment 15 May 1924 The King's Own Rifles of Canada re-established 15 Sep 1924. The King's Own Rifles of Canada (MG) created when amalgamation occured with B Coy 12th MG Battalion
The Lake Superior Regiment	nil
The Algonquin Rifles	Redesignated The Algonquin Regiment 15 Feb 1929 B, C and D Coys amalgamated with Northern Pioneers while retaining name 15 Dec 1936. A Coy amalgamated with Sault Ste. Marie Regiment 15 Dec 1936
The Rainy River and Kenora Light Infantry	Redesignated The Kenora Light Infantry 1 Sep 1921 Converted to artillery 15 Dec 1936
The Manitoba Rangers	Disbanded 14 Dec 1936
The Winnipeg Grenadiers	Amalgamated with 10th MG Bn to become The Winnipeg Grenadiers (MG) 15 Nov 1936.
Edmonton Regiment	Redesignated The Edmonton Regiment 15 Mar 1924 Reorganized 15 May 1924 into The Edmonton Regiment and The Edmonton Fusiliers
nil	2nd Battalion of Edmonton Regiment redesignated The Edmonton Fusiliers 15 May 1924 The Edmonton Fusiliers (MG) became so designated upon amalgamation with A Coy 13 MG Bn.
The Rocky Mountain Rangers	nil
The Calgary Regiment	1st Battalion redesignated 1st Battalion Calgary Highlanders, The Calgary Regiment 15 Sep 1921 Reorganized as two separate regiments 15 May 1924 The Calgary Highlanders The Calgary Regiment absorbed HQ and B Coys 13 MG Bn, redesignated The Calgary Regiment (Tank) 15 Dec 1936.
The North Saskatchewan Regiment	Redesignated The Prince Albert Volunteers 15 Apr 1924 Amalgamated with The Battleford Light Infantry 15 Dec 1936 to become The Prince Albert and Battleford Volunteers
The Winnipeg Light Infantry	Redesignated The Winnipeg Light Infantry (MG) 12 Dec 1936
The Kootenay Regiment	Disbanded 14 Dec 1936
The North Waterloo Regiment	Redesignated The Scots Fusiliers of Canada 15 Sep 1928
The Irish Regiment	Redesignated The Irish Regiment of Canada 1 Sep 1932 Amalgamated with HQ and A Coys 1 MG Bn and designated The Irish Regiment of Canada (MG) 15 Dec 1936
Mississauga Regiment	Redesignated The Toronto Scottish Regiment 1 Sep 1921 Amalgamated with HQ and A Coys, 1st MG Bn to become The Toronto Scottish Regiment (MG) 15 Dec 1936
The Toronto Regiment	Amalgamated with The Royal Grenadiers to form The Royal Regiment of Toronto Grenadiers 15 Dec 1936
nil	The West Toronto Regiment raised 15 Jan 1921 Redesignated The Queen's Rangers (1st American Regiment) 1 Dec 1927 Amalgamated with The York Rangers to become The Queen's York Rangers (1st American Regiment) 15 Dec 1936
nil	The Alberta Regiment organized 1 Apr 1921 Reorganized as two regiments 15 May 1924: The North Alberta Regiment and The South Alberta Regiment The North Alberta Regiment disbanded 1 Feb 1936 The South Alberta Regiment amalgamated C Coy 13 MG Bn 1 Apr 1936
nil	The Assiniboia Regiment formed 15 May 1924, 1st Battalion formed from redesignation of 4th Battalion, The South Saskatchewan Regiment and 2nd Battalion formed by redesignation of 9th Battalion, The South Saskatchewan Regiment. Converted to artillery 30 Nov 1936.
nil	The Battleford Light Infantry organized 15 May 1924 Amalgamated with The Prince Albert Volunteers 15 Dec 1936 to become The Prince Albert and Battleford Volunteers
nil	The Saskatoon Light Infantry formed 15 May 1924 from the 1st and 5th Battalions of The North Saskatchewan Regiment Amalgamated with C Coy 12 MG Bn to become The Saskatoon Light Infantry (MG)
nil	The Weyburn Regiment formed 15 May 1924 Amalgamated with The Saskatchewan Border Regiment 15 Dec 1936 to become The South Saskatchewan Regiment
nil	The Saskatchewan Border Regiment formed 15 May 1924 Amalgamated with The Weyburn Regiment 15 Dec 1936 to become The South Saskatchewan Regiment
nil	The Yorkton Regiment formed 15 May 1924 Disbanded 14 Dec 1936
nil	The Westminster Regiment was organized 15 May 1924 from two companies of the 6th Regiment (Duke of Connaught's Own Rifles) Amalgamated with C Coy 11 MG Bn to become The Westminster Regiment (MG) 15 Dec 1936
nil	The Vancouver Regiment was organized 15 May 1924 Amalgamated with The Irish Fusiliers of Canada 1 Jun 1936 to become The Irish Fusiliers of Canada (Vancouver Regiment)
nil	The Essex Regiment (Tank) raised 15 Dec 1936.
nil	The New Brunswick Regiment (Tank) formed 15 Dec 1936 from HQ and B Coys 7 MG Bn