# Supplementary Order of Battle

In the Canadian Army, a regiment is placed on the Supplementary Order of Battle when the need for the regiment's existence is no longer relevant. When placed on the Supplementary Order of Battle, a regiment is considered "virtually disbanded", and is re-formed only when the Department of National Defence deems the unit is required again. The Supplementary Order of Battle was instituted as an 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 takes its old place in the order of precedence and its colours, traditions and battle honours remain as if there had been no interruption of service.
In the aftermath of the Somalia Affair in 1993, The Canadian Airborne Regiment was completely disbanded and not placed on the Supplementary Order of Battle.
Two regiments have been removed from the Supplementary Order of Battle by amalgamating them with existing Primary Reserve units: the Irish Fusiliers of Canada (The Vancouver Regiment), on the order since 1965, was merged into the British Columbia Regiment (Duke of Connaught's Own) in 2002. The 19th Alberta Dragoons, also on the order since 1965, was merged into the South Alberta Light Horse in 2006.
On September 5, 2008, Canadian Defence Minister Peter MacKay announced that The Halifax Rifles (RCAC) would be reorganized as an active unit. The Halifax Rifles are the first, and so far only, regiment to rejoin the Primary Reserve from the Supplementary Order of Battle.

## Regiments on the Supplementary Order of Battle
### Royal Canadian Armoured Corps

Armoured units on the Supplementary Order of Battle :
| Regiment | Formed | To SOB | Headquarters |
| 4th Princess Louise Dragoon Guards | 1875 | 1965 | Ottawa |
| 12th Manitoba Dragoons | 1903 | 1964 | Winnipeg |
| 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 |
| 8th Field Artillery Regiment, RCA | 1912 | 1970 | Hamilton, Ontario |
| 12th Field Artillery Regiment, RCA | 1905 | 1965 | Fredericton, New Brunswick |
| 14th Field Artillery Regiment, RCA | 1912 | 1968 | Yarmouth, Nova Scotia |
| 18th Field Artillery Regiment, RCA | 1920 | 1970 | Lethbridge, Alberta |
| 21st Field Artillery Regiment, RCA | 1936 | 1970 | Wingham, Ontario |
| 24th Field Artillery Regiment, RCA | 1914 | 1965 | Trail, British Columbia |
| 27th Field Artillery Regiment, RCA | 1910 | 1970 | Farnham, Quebec |
| 29th Field Artillery Regiment, RCA | 1898 | 1965 | Sarnia, Ontario |
| 34th Field Artillery Regiment, RCA | 1942 | 1965 | Montreal, Quebec |
| 37th Field Artillery Regiment, RCA | 1905 | 1965 | Montreal, Quebec |
| 39th Field Artillery Regiment (Self-Propelled), RCA | 1914 | 1965 | Winnipeg, Manitoba |
| 40th Field Artillery Regiment, RCA | 1936 | 1981 | Kenora, Ontario |
| 44th Field Artillery Regiment, RCA | 1946 | 1965 | St. Catharines, Ontario |
| 46th Field Artillery Regiment, RCA | 1936 | 1968 | Drummondville, Quebec |
| 50th Field Artillery Regiment (The Prince of Wales Rangers), RCA | 1866 | 1970 | Peterborough, Ontario |
| 53rd Field Artillery Regiment, RCA | 1946 | 1968 | Yorkton, Saskatchewan |
| 57th Field Artillery Regiment (2nd/10th Dragoons), RCA | 1872 | 1970 | Niagara Falls, Ontario |
| 19th Medium Artillery Regiment, RCA | 1920 | 1965 | Calgary, Alberta |
| 33rd Medium Artillery Regiment, RCA | 1946 | 1965 | Cobourg, Ontario |
| 42nd Medium Artillery Regiment, RCA | 1931 | 1965 | Toronto, Ontario |
| 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 |
| Canadian Guards | 1951 | 1970 | Petawawa |
| Victoria Rifles of Canada | 1862 | 1965 | Montreal |
| Royal Rifles of Canada | 1862 | 1966 | Quebec City |
| Régiment de Joliette | 1871 | 1964 | Joliette |
| Perth Regiment | 1886 | 1965 | Stratford, Ontario |
| South Saskatchewan Regiment | 1905 | 1968 | Estevan |
| Winnipeg Grenadiers | 1908 | 1965 | Winnipeg |
| 1st Battalion, Irish Regiment of Canada | 1915 | 1965 | Toronto |
| Yukon Regiment | 1962 | 1968 | Whitehorse, Yukon |