1 Squadron
| 1 Field Squadron | ||
| Dates | Location | Higher Formation / Notes |
| 1946.02 | Germany: | 7th Armoured Division |
| Mar 48: Disbanded | ||
| 1 Field Squadron | ||
| 1948.09 | England: | Reformed |
| Late 1948 | Malaya/Singapore | |
| 1949.05 | Hong Kong | Indep? |
| 1950.02 | Germany: St Georges Barracks, Minden | 27 Field Engineer Regiment |
| 1957 | Germany: Alanbrooke Bks, Paderborn | 4 Div Engineers Sup to 20 Armd Bde |
| 1960: Came under command 1 Div Engineers | 1 Div Engineers | |
| 1962 | Germany: Assaye Barracks, Neinburg | 1 Div Engineers |
| Apr 69: Assaye Barracks, Neinburg | 21 Engineer Regiment | |
| 30 Apr - 5 Aug 71: Northern Ireland Tour: Long Kesh | 21 Engineer Regiment Infantry role |
|
| 8 Nov 72 - 6 Mar 73: Northern Ireland Tour: Ballykelly | ||
| 15 Dec 74 - 11 Apr 75: Northern Ireland Tour: Long Kesh | 21 Engineer Regiment Infantry role |
|
| 25 Sep 76 - 29 Dec 76: Northern Ireland Tour: Londonderry | 21 Engineer Regiment Infantry role |
|
| 1978: Assaye Barracks, Neinburg | 1 Armd Div Engr Regiment | |
| 23 Jun 78 - 25 Oct 78: Northern Ireland Tour: Ballykelly | ||
| Jan 81: 1 Armd Div Engr Regiment renamed 21 Engineer Regiment | 21 Engineer Regiment | |
| Jul - Nov 84: Falkland Islands | 37 Engineer Regiment | |
| 1990: Gulf | 21 Engineer Regiment Supporting 7 Armd Bde |
|
| May - Oct 93: Former Yugoslavia (Op Grapple 2) | Replaced 35 Eng Regt | |
| 1995: Gornji Vakuf and Bugojno, Former Yugoslavia (Op Grapple 6) | ||
| 1996.01 | Germany: Quebec Barracks, Osnabruck | 21 Engineer Regiment |
| 1997 - Sep 97: Falkland Islands | ||
| 1998: Kosovo (Operation Agricola 1) | ||
| 1999 | Germany: Roberts Barracks, Osnabruck | 21 Engineer Regiment |
| Apr 00: Renamed 1 Armoured Engineer Squadron | ||
| 2008.08 | England: Catterick | 21 Engineer Regiment |
| Apr - Oct 10: Afghanistan: Op Herrick 12 | ||
| Oct 12 – Apr 13: Afghanistan: Op Herrick 17 | ||
| 1 Fortress Squadron | ||
| c1971 | Gibraltar | |
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