42 Squadron
| Dates | Location | Higher Formation / Notes |
| 42 Engineer Squadron | ||
| 1950.01 | Egypt: Canal Zone | 35 Army Engineer Regiment |
| 1950: Retitled 42 Field Squadron or 64 Squadron renumbered 42 Squadron | ||
| 1954.01 | Cyprus | 35 Army Engineer Regiment |
| 1955.12 | England: Ripon | 35 Army Engineer Regiment |
| Aug - Nov 56: England: Marchwood | ||
| Nov 56 - Jan 57: Middle East: Port Said then Cyprus | 35 Army Engineer Regiment ‘Op Musketeer’ (Suez Invasion) |
|
| 1957.11 | Germany: Osnabruck | 35 Army Engineer Regiment |
| 1964.09 | Germany: Gordon Bks, Hameln | 35 Engineer Regiment |
| Mar - Jun 1968: Northern Ireland: Operation JOLE | ||
| 30 Apr - 5 Aug 71: Northern Ireland Tour: Long Kesh | 21 Engineer Regiment: Infantry Role | |
| 29 Dec 72 - 30 Mar 73: Northern Ireland Tour: East Belfast | 35 Engineer Regiment: Infantry Role | |
| 30 Oct 74 - 28 Feb 75: Northern Ireland Tour: Ballykelly | ||
| 22 Oct 76 - 24 Feb 77: Northern Ireland Tour: Ballykelly | ||
| Dec 77: 35 Regiment re-formed as 4 Armoured Division Engineer Regiment | 4 Armd Div Engr Regt. | |
| 23 Jan to 27 Apr 78: Northern Ireland Tour: Armagh | 4 Armd Div Engr Regt. | |
| 20 Mar - 21 Jul 81: Northern Ireland Tour: Ballykelly | ||
| Jan 81: 4 Armd Div Engr Regt re-titled 35 Engineer Regiment | 35 Engineer Regiment | |
| Oct 83 - Mar 84: Falkland Islands | 37 Engineer Regiment | |
| Oct 91 - Mar 92: Northern Ireland Tour: | ||
| 29 Oct 92 - May 93: Vitez, Bosnia-Herzrgovina: Op Grapple 1 | 35 Engineer Regiment | |
| Jun - Nov 95: Ploce, Bosnia: Op Grapple Surge | 35 Engineer Regiment To build a camp for 24 Air Mobile Bde |
|
| 1 Dec 99: Came under command 28 Engineer Regiment | 28 Engineer Regiment | |
| Oct 00 – Mar 01: OP DESCANT | 28 Engineer Regiment | |
| Jun – Jul 03: Op CORAL (Congo) | 28 Engineer Regiment | |
| May – Jul 04: OP TARROCK (Afghanistan) | 28 Engineer Regiment | |
| Mar – Sep 05: OP DESCANT | 28 Engineer Regiment | |
| Oct 06 - Apr 07: Afghanistan: Op Herrick 5 | ||
| 42 Field Squadron | ||
| c2008 | Germany: Gordon Bks, Hameln | 28 Engineer Regiment |
| Oct 09 - Apr 10: Afghanistan: Op Herrick 11 | ||
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