Volume 3, Part 1: Armour, Artillery and Field Engineer Regiments - Artillery Regiments and Batteries


The following document is available for downloading or viewing:

For more information on accessing this file, please visit our help page.


This Reserve Force regiment originated in Lethbridge, Alberta on 10 November 1992, when the '18th Air Defence Regiment, RCA' was authorized to be formed.1

Notes :
The 18th Air Defence Regiment's date of origin is not traced to the formation date of the '25th Battery, CFA' of 1908 (see below) as lineage is traced from the formation of unit, not sub-unit, sized organizations, ie. regiments and battalions.

No lineal connection with the '18th Field Artillery Regiment, RCA formed on 2 February 1920 and placed on the Supplementary Order of Battle on 1 April 1970.

The 20th Independent Field Battery, RCA originated in Lethbridge, Alberta on 1 February 1908 when the '25th Battery, CFA' was authorized to be formed.3 It was redesignated: '20th Battery, CFA' on 2 February 1920;4 '20th Field Battery, CA' on 1 July 1925;5 '20th Field Battery, RCA' on 3 June 1935;6 '20th (Reserve) Field Battery, RCA' on 7 November 1940;7 '20th Field Battery, RCA' on 1 April 1946;8 '20th Field Battery (Self propelled), RCA' on 19 June 1947;9 '20th Field Battery, RCA' on 4 December 1964;10 and '20th Independent Field Battery, RCA' on 1 April 1970.11 The battery was reorganized as a regiment and designated '18th Air Defence Regiment, RCA' on 10 November 1992, as above.


The 20th Battery, CFA was disbanded for the purpose of reorganization on 15 September 1920 and reorganized the same day (GO 252/20). This change was administrative and did not affect the lineage of the battery.


'20th Battery, CFA, CEF'

Headquarters Location

Lethbridge, Alberta

Allocated Batteries

20th Air Defence Battery, RCA
39th Air Defence Artillery Battery, RCA

Top of Page


The First World War

The 25th Battery, which was authorized on 7 November 1914 as the '20th Field Battery, CFA, CEF',12 embarked for Britain on 29 June 1915.13 It disembarked in France on 18 January 1916,14 where it provided field artillery support as part of the 5th Brigade, CFA, CEF in France and Flanders until the end of the war.15 The battery was disbanded on 23 October 1920.16

The Second World War

The 20th Field Battery mobilized the '20th Field Battery, RCA, CASF' on 1 September 1939.17 It was redesignated '20th Anti-Tank Battery, RCA, CASF' on 1 December 1939.18 It provided anti- tank support as part of the '2nd Anti-Tank Regiment, RCA, CASF', 2nd Canadian Infantry Division in North-West Europe until the end of the war.19 The overseas battery was disbanded on 22 September 1945.20

Top of Page

1. MOO 92262, 10 Nov 92 / DMO 92262, 10 nov 92. Message, DGFD 1021, Organization Msg - Reorganization and Redesignation of LR Scot Regt and 20 Indep Fd Bty, 171521Z Nov 92, in CFOO file 5097; AHR, 18 AD Regiment, RCA, 1992 Report, file 1325-1 (CO), nd., in AHR file 1326-5251)

2. MOO 97223, 14 August 97 / DMO 9223, 14 août 97.

3. GO 12/08.

4. GO 13/20.

5. GO 82/25.

6. GO 58/35.

7. GO 273/40.

8. GO 115/46. This battery is not specifically redesignated as part of this General Order, however, this order cancels the effects of GO 273/40 for Reserve units of the Canadian Army / Cette batterie n'est pas spécifiquement rebaptisée par cet Ordre général. Par contre, cet ordre annule les effets du GO 273/40 pour les unités de Réserve de l'Armée canadienne.

9. CAO 76-3, Supp Issue No. 43/47.

10. SD 1 Letter No. 64/58; Letter, HQ Western Command to D Org, 18 Oct 65, file ref: WC 2001-3/1 (G).

11. CFOO 70/15.

12. GO 36/15.

13. CEF Sailing List, Vol XII.

14. CEF Unit Ledger; and/et G.W.L. Nicholson, The Gunners of Canada. The History of the Royal Regiment of Canadian Artillery, vol. 1 (Toronto, 1967), p. 246.

15. G.W.L. Nicholson, The Gunners of Canada. The History of the Royal Regiment of Canadian Artillery, vol. 1 (Toronto, 1967), passim.

16. GO 191/20.

17. GO 135/39.

18. GO 75/40.

19. G.W.L. Nicholson, The Gunners of Canada. The History of the Royal Regiment of Canadian Artillery, vol. 2 (Toronto, 1972), passim.

20. GO 52/46.

Footnotes notice: This content is provided as it appears in the originating document (see PDF link above) and cannot be altered. Some notes reference annotation in only one of the official languages, and therefore numbers may not match in the content you are viewing. For clarification, we invite you to check the corresponding footnote in the French page.