12 Squadron
| 12 Field Squadron | ||
| Dates | Location | Higher Formation / Notes |
| 1947 | Middle East | Formed by redes of 238 Field Coy RE 1st Infantry Division RE |
| 1948.05 | Libya | 22 Field Engineer Regiment |
| 1951.04 | Libya: Benghazi | 28 Field Engineer Regiment |
| 1951.06 | Korea | 28 Field Engineer Regiment |
| 1955.04 | England: Devizes | 28 Field Engineer Regiment |
| Jun 56 - Jun 57: Christmas Island | 28 Field Engineer Regiment | |
| Redesignated 12 Independent Field Squadron, absorbing 81 Indep Fd Sqn | ||
| 1958.03 | Christmas Island | Independent in sp of 36 Corps Engr Regt |
| 1959.03 | England: Barton Stacey | in sp 2 Bde Gp in 3 Div. |
| Nov 59: Reduced to cadre | ||
| 12 Field Squadron | ||
| 1960.12 | England: Ripon | 63 Fd Sqn renumbered 12 Fd Sqn 38 Corps Engineer Regiment |
| Oct 63 - Oct 64: Aden | ||
| 1964.12 | Germany: Roberts Bks, Osnabruck | 25 Corps Engineer Regiment |
| Apr 69: Regiment renamed 25 Engineer Regiment | 25 Engineer Regiment | |
| 1 Aug - 30 Nov 73: Northern Ireland Tour: East Belfast | 25 Engineer Regiment Infantry role |
|
| 26 Feb - 26 Jun 75: Northern Ireland Tour: Ballykelly | ||
| Sep 76: 23 & 25 Eng Regts amalgamated to form 2 Armd Div Engr Regt | 2 Armd Div Engr Regt | |
| 9 Jun - 11 Oct 77: Northern Ireland Tour: Belfast (City Centre/Markets) | 2 Armd Div Engr Regt Infantry Role |
|
| 22 Feb - 21 Jun 79: Northern Ireland Tour: Ballykelly | ||
| 2 Oct 79 - 2 Feb 80: Northern Ireland Tour: Belfast (Monagh) | 2 Armd Div Engr Regt Infantry Role |
|
| 1982: 2 Armd Div Engr Regt renamed 25 Engineer Regiment | 25 Engineer Regiment | |
| Sep 90 – Apr 91: Kuwait 'Op GRANBY' | ||
| 1992 | Northern Ireland: Antrim??? | 25 Engineer Regiment |
| 1992.08 | Germany: Bindon Barracks, Hameln | 28 Amphibious Engineer Regiment |
| 6 Mar - 5 Sep 93: Northern Ireland: | ||
| 1994 | Northern Ireland: Antrim | 25 Engineer Regiment |
| May 94: Renamed 12 (Nova Scotia) Headquarters Squadron | ||
| Apr 99: Disbanded | ||
| 12 (Nova Scotia) HQ & Sp Sqn (Air Assault) | ||
| 2002.09 | England: Woodbridge | Reformed 23 Engineer Regiment (Air Assault) |
| Feb - Jun 2003: Kuwait then Iraq | 16 Air Assault Brigade | |
| 2006 | England: Rock Barracks, Woodbridge | 23 Engineer Regiment (Air Assault) |
| Apr - Oct 08: Afghanistan: Op Herrick 8 | ||
| Oct 10 - Apr 11: Afghanistan: Op Herrick 13 | ||
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