In Canada, a regiment is placed on the Supplementary Order of Battle when the need for the regiments existence is no longer relevant. When placed on the Supplementary Order of Battle, a regiment is considered "virtually disbanded", and will only be reformed should the need be dire. The Supplementary Order of Battle was instituted as alternative to outright disbandment during the army rationalizations of the 1960s. If a regiment is re-manned and moved from the Supplementary Order of Battle, it will take its old place in order of precedence and its colours, traditions, and battle honours will remain as if there had been no interruption of service.

In the aftermath of the Somalia Affair

Somalia Affair

The Somalia Affair was a 1993 military scandal later dubbed "Canada's national shame". It peaked with the brutal beating death of a Somali teenager at the hands of two Canadian soldiers participating in humanitarian efforts in Somalia. The crime, documented by grisly photos, shocked the Canadian...

 in 1995, The Canadian Airborne Regiment

The Canadian Airborne Regiment

The Canadian Airborne Regiment was a Canadian Forces formation created on April 8, 1968. It was not an administrative regiment in the commonly accepted British Commonwealth sense, but rather a tactical formation manned from other regiments and branches...

 was completely disbanded and not placed on the Supplementary Order of Battle.

On September 5, 2008, the Defence Minister, Peter MacKay

Peter MacKay

Peter Gordon MacKay, PC, QC, MP is a lawyer and politician from Nova Scotia, Canada. He is the Member of Parliament for Central Nova and currently serves as Minister of National Defence in the Cabinet of Canada....

, announced that The Halifax Rifles (RCAC)

The Halifax Rifles (RCAC)

The Halifax Rifles is a Canadian Army regiment that served between the years of 1860 and 1965 before being placed on the Supplementary Order of Battle, which meant that they were reduced to nil strength. The regiment was reactivated on May 10, 2009, as a reserve force unit performing the role of...

 will be reorganized as an active unit. This was the first and so far only regiment to be reactivated to the Primary Reserve from the Supplementary Order of Battle. Two other regiments have been removed from the Supplementary Reserve by amalgamating them with Primary Reserve units: the Irish Fusiliers of Canada (The Vancouver Regiment) merged into the British Columbia Regiment (Duke of Connaught's Own) in 2002 and the 19th Alberta Dragoons

19th Alberta Dragoons

The 19th Alberta Dragoons originated in Edmonton, Alberta on 1 February 1908, when the 19th The Alberta Mounted Rifles were authorized to be formed and was redesignated as the 19th Alberta Dragoons on 3 January 1911. On 16 February 1936, it was amalgamated with The Alberta Mounted Rifle. It was...

 merged into the South Alberta Light Horse in 2006.

Royal Canadian Armoured Corps

Armoured units on the Supplementary Order of Battle

Regiment	Formed	To SOB	Headquarters
4th Princess Louise Dragoon Guards 4th Princess Louise Dragoon Guards The 4th Princess Louise Dragoon Guards is an inactive armoured regiment of the Canadian militia.-Lineage:The Regiment's history dates back to Ottawa in the early 1870s and its membership in Canada's militia...	1875	1965	Ottawa Ottawa Ottawa is the capital of Canada, the second largest city in the Province of Ontario, and the fourth largest city in the country. The city is located on the south bank of the Ottawa River in the eastern portion of Southern Ontario...
12th Manitoba Dragoons	1903	1964	Winnipeg Winnipeg Winnipeg is the capital and largest city of Manitoba, Canada, and is the primary municipality of the Winnipeg Capital Region, with more than half of Manitoba's population. It is located near the longitudinal centre of North America, at the confluence of the Red and Assiniboine Rivers .The name...
14th Canadian Hussars	1910	1968	Swift Current

Royal Regiment of Canadian Artillery

Regiment	Formed	To SOB	Headquarters
3rd Regiment, Royal Canadian Horse Artillery	1951	1992	Shilo, Manitoba
4th Regiment, Royal Canadian Horse Artillery	1952	1970	Petawawa, Ontario Petawawa, Ontario Petawawa is a town located in eastern portion of Southern Ontario. Situated in the Ottawa Valley, with a population of 14,651 . Petawawa is the most populous municipality in Renfrew County.-Geography:...
8th Field Artillery Regiment, RCA	1912	1970	Hamilton, Ontario Hamilton, Ontario Hamilton is a port city in the Canadian province of Ontario. Conceived by George Hamilton when he purchased the Durand farm shortly after the War of 1812, Hamilton has become the centre of a densely populated and industrialized region at the west end of Lake Ontario known as the Golden Horseshoe...
12th Field Artillery Regiment, RCA	1905	1965	Fredericton, New Brunswick New Brunswick New Brunswick is one of Canada's three Maritime provinces and is the only province in the federation that is constitutionally bilingual . The provincial capital is Fredericton and Saint John is the most populous city. Greater Moncton is the largest Census Metropolitan Area...
14th Field Artillery Regiment, RCA	1912	1968	Yarmouth, Nova Scotia Yarmouth, Nova Scotia Yarmouth is a town and fishing port located on the Gulf of Maine in rural southwestern Nova Scotia, Canada. It is the shire town of Yarmouth County. The town is located in the heart of the world's largest lobster fishing grounds and has Canada's highest lobster catch.- History :The townsite may...
18th Field Artillery Regiment, RCA	1920	1970	Lethbridge Lethbridge Lethbridge is a city in the province of Alberta, Canada, and the largest city in southern Alberta. It is Alberta's fourth-largest city by population after Calgary, Edmonton and Red Deer, and the third-largest by area after Calgary and Edmonton. The nearby Canadian Rockies contribute to the city's... , Alberta Alberta Alberta is a province of Canada. It had an estimated population of 3.7 million in 2010 making it the most populous of Canada's three prairie provinces...
21st Field Artillery Regiment, RCA	1936	1970	Wingham, Ontario Wingham, Ontario Wingham is a community located in the municipality of North Huron, Ontario, Canada, which is located in Huron County...
24th Field Artillery Regiment, RCA	1914	1965	Trail, British Columbia Trail, British Columbia Trail is a city in the West Kootenay region of the Interior of British Columbia, Canada.-Geography:Trail has an area of . The city is located on both banks of the Columbia River, approximately 10 km north of the United States border. This section of the Columbia River valley is located between the...
27th Field Artillery Regiment, RCA	1910	1970	Farnham, Quebec Farnham, Quebec Farnham is a town located in the province of Quebec, Canada. It is part of the Brome-Missisquoi regional county municipality, in the administrative region of Montérégie. The population as of the Canada 2006 Census was 7,809, making it the second most populated community in the RCM.- History :The...
29th Field Artillery Regiment, RCA	1898	1965	Sarnia, Ontario Sarnia, Ontario Sarnia is a city in Southern Ontario, Canada . It is the largest city on Lake Huron and is located where the upper Great Lakes empty into the St. Clair River....
34th Field Artillery Regiment, RCA	1942	1965	Montreal Montreal Montreal is a city in Canada. It is the largest city in the province of Quebec, the second-largest city in Canada and the seventh largest in North America... , Quebec Quebec Quebec or is a province in east-central Canada. It is the only Canadian province with a predominantly French-speaking population and the only one whose sole official language is French at the provincial level....
37th Field Artillery Regiment, RCA	1905	1965	Montreal, Quebec
39th Field Artillery Regiment (Self-Propelled), RCA	1914	1965	Winnipeg Winnipeg Winnipeg is the capital and largest city of Manitoba, Canada, and is the primary municipality of the Winnipeg Capital Region, with more than half of Manitoba's population. It is located near the longitudinal centre of North America, at the confluence of the Red and Assiniboine Rivers .The name... , Manitoba Manitoba Manitoba is a Canadian prairie province with an area of . The province has over 110,000 lakes and has a largely continental climate because of its flat topography. Agriculture, mostly concentrated in the fertile southern and western parts of the province, is vital to the province's economy; other...
40th Field Artillery Regiment, RCA	1936	1981	Kenora, Ontario Ontario Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....
44th Field Artillery Regiment, RCA	1946	1965	St. Catharines, Ontario Ontario Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....
46th Field Artillery Regiment, RCA	1936	1968	Drummondville, Quebec Quebec Quebec or is a province in east-central Canada. It is the only Canadian province with a predominantly French-speaking population and the only one whose sole official language is French at the provincial level....
50th Field Artillery Regiment (The Prince of Wales Rangers), RCA	1866	1970	Peterborough, Ontario Peterborough, Ontario Peterborough is a city on the Otonabee River in southern Ontario, Canada, 125 kilometres northeast of Toronto. The population of the City of Peterborough was 74,898 as of the 2006 census, while the census metropolitan area has a population of 121,428 as of a 2009 estimate. It presently ranks...
53rd Field Artillery Regiment, RCA	1946	1968	Yorkton, Saskatchewan Saskatchewan Saskatchewan is a prairie province in Canada, which has an area of . Saskatchewan is bordered on the west by Alberta, on the north by the Northwest Territories, on the east by Manitoba, and on the south by the U.S. states of Montana and North Dakota....
57th Field Artillery Regiment (2nd/10th Dragoons), RCA	1872	1970	Niagara Falls, Ontario Niagara Falls, Ontario Niagara Falls is a Canadian city on the Niagara River in the Golden Horseshoe region of Southern Ontario. The municipality was incorporated on June 12, 1903...
19th Medium Artillery Regiment, RCA	1920	1965	Calgary Calgary Calgary is a city in the Province of Alberta, Canada. It is located in the south of the province, in an area of foothills and prairie, approximately east of the front ranges of the Canadian Rockies... , Alberta Alberta Alberta is a province of Canada. It had an estimated population of 3.7 million in 2010 making it the most populous of Canada's three prairie provinces...
33rd Medium Artillery Regiment, RCA	1946	1965	Cobourg, Ontario Cobourg, Ontario Cobourg is a town in the Canadian province of Ontario, located in Southern Ontario 95 km east of Toronto. It is the largest town in Northumberland County. Its nearest neighbour is Port Hope, to the west. It is located along Highway 401 and the former Highway 2...
42nd Medium Artillery Regiment, RCA	1931	1965	Toronto Toronto Toronto is the provincial capital of Ontario and the largest city in Canada. It is located in Southern Ontario on the northwestern shore of Lake Ontario. A relatively modern city, Toronto's history dates back to the late-18th century, when its land was first purchased by the British monarchy from... , Ontario Ontario Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....
1st Artillery Locating Regiment, RCA	1946	1965	Toronto, Ontario

Royal Canadian Infantry Corps

Infantry units on the Supplementary Order of Battle

Regiment	Formed	To SOB	Headquarters
The Canadian Guards The Canadian Guards The Canadian Guards was an infantry regiment of the Canadian Army that served in the same role as the five regiments of Foot Guards in the British Army...	1951	1970	Petawawa
Victoria Rifles of Canada Victoria Rifles of Canada The Victoria Rifles of Canada was an infantry regiment of the Canadian Army...	1862	1965	Montreal Montreal Montreal is a city in Canada. It is the largest city in the province of Quebec, the second-largest city in Canada and the seventh largest in North America...
The Royal Rifles of Canada	1862	1966	Quebec City Quebec City Quebec , also Québec, Quebec City or Québec City is the capital of the Canadian province of Quebec and is located within the Capitale-Nationale region. It is the second most populous city in Quebec after Montreal, which is about to the southwest...
Le Régiment de Joliette	1871	1964	Joliette
The Perth Regiment The Perth Regiment The Perth Regiment was an infantry regiment of the Canadian Army. Originally founded in 1866 as the 28th Perth Battalion of Infantry the regiment went through several name changes including: 1900 - 28th Perth Regiment; 1920 - The Perth Regiment; 1936 - The Perth Regiment ; 1941 - The Perth Regiment...	1886	1965	Stratford, Ontario Stratford, Ontario Stratford is a city on the Avon River in Perth County in southwestern Ontario, Canada with a population of 32,000.When the area was first settled by Europeans in 1832, the townsite and the river were named after Stratford-upon-Avon, England. It is the seat of Perth County. Stratford was...
The South Saskatchewan Regiment The South Saskatchewan Regiment The South Saskatchewan Regiment was an infantry regiment of the Canadian Forces formed in 1936 by the amalgamation of The Weyburn Regiment and The Saskatchewan Border Regiment. It was reduced to nil strength and placed on the Supplementary Order of Battle in 1968...	1905	1968	Estevan
The Winnipeg Grenadiers The Winnipeg Grenadiers The Winnipeg Grenadiers was an infantry regiment of the Canadian Army formed on 1st April 1908 under General Order No. 20. Initially it was raised with Headquarters at Morden, Manitoba and companies at: ‘A’ Company at Morden, ‘B’ Company at Morden, ‘C’ Company at Manitou, ‘D’ Company at Carmen,‘E’...	1908	1965	Winnipeg Winnipeg Winnipeg is the capital and largest city of Manitoba, Canada, and is the primary municipality of the Winnipeg Capital Region, with more than half of Manitoba's population. It is located near the longitudinal centre of North America, at the confluence of the Red and Assiniboine Rivers .The name...
The Yukon Regiment	1962	1968	Whitehorse, Yukon Whitehorse, Yukon Whitehorse is Yukon's capital and largest city . It was incorporated in 1950 and is located at kilometre 1476 on the Alaska Highway in southern Yukon. Whitehorse's downtown and Riverdale areas occupy both shores of the Yukon River, which originates in British Columbia and meets the Bering Sea in...