42 Commando
| Dates | Locations | Higher Formation |
| 1945 | India: | 3 Commando Brigade |
| 1945.09 | Hong Kong | 3 Commando Brigade |
| Jun 47: Sailed from Hong Kong: | ||
| 1947.07 | Malta | 3 Commando Brigade |
| Jan - Jun 48: Palestine | ||
| 21 Jul 49: Sailed from Malta. | ||
| 1949.08 | Hong Kong | 3 Commando Brigade |
| 1950.05 | Malaya: Ipoh | 3 Commando Brigade |
| 1953.06 | Malta | 3 Commando Brigade |
| 29 Nov 52: 1st colours presented to Commando. | ||
| May 53 - Jun 54: Egypt: Canal Zone | 3 Commando Brigade | |
| 1954.10 | England: Bickleigh: to staff the Commando School. | |
| 1 Aug 56: Commando reactivated. | ||
| Nov 56: Suez: Port Said | 3 Commando Brigade | |
| Summer 58: Commando reactivated for Lebanon crisis. | ||
| 1959: Reactivated for commando carrier force and embarked on Bulwark. | ||
| 1960.03 | Singapore: HMS Simbang or RNAS Sembawang | |
| July 61: Kuwait | ||
| 1962: Troops reorganised as Companies K, L, M | ||
| Dec 62 - Apr 63: Sarawak & Brunei, 'L' coy took part in Limbang operation. | ||
| Jul - Oct 63: Sarawak | ||
| Feb - Jun 64: Sarawak | 99 Gurkha Brigade | |
| Dec 64 - May 65: Sarawak: Tawau | ||
| Dec 65 - May 66: Borneo: Lundu | ||
| Oct - Nov 67: Aden: Last unit to leave Aden, covered final withdrawal. | ||
| 1971.08 | England: Bickleigh | |
| Oct 71 - Jan 72: Northern Ireland: RUC Div K | ||
| Jul - Sep 72: Northern Ireland: East Belfast | ||
| Feb - Jun 73: Northern Ireland: Belfast (New Lodge/Unity) | ||
| Feb - Jun 74: Northern Ireland: Belfast (New Lodge/Unity) | ||
| Oct - Nov 74: Northern Ireland: Portadown/Newry/Bessbrook (NI General Election) | ||
| Oct - Nov 75: Northern Ireland: South Armagh (Spearhead-Sectarian Murders) | ||
| Feb - Jun 76: Northern Ireland: Belfast (Monagh/Anderstown) | ||
| Jul - Nov 78: Northern Ireland: Bessbrook | ||
| 1979: Hong Kong: IS duties | ||
| Jun - Aug 80: New Hebrides: Vanatu (Company) | ||
| May - Jun 82: Falklands | ||
| Jul - Nov 84: Northern Ireland: Bessbrook | ||
| May - Jul 87: Northern Ireland: Spearhead | ||
| Jun - Oct 89: Northern Ireland: Belfast Roulement Bn | ||
| Nov 91 - May 92: Northern Ireland: Fermanagh | ||
| Oct 94 - Apr 95: Northern Ireland: Aldergrove | ||
| May - June 00: Sierra Leone | ||
| Feb - Mar 03: Persian Gulf | 3 Commando Brigade | |
| Mar - ?? 03: Iraq | 3 Commando Brigade | |
| Oct 06 - Apr 07: Afghanistan (Op Herrick 5) | 3 Commando Brigade | |
| Oct 08 - Apr 09: Afghanistan: Helmand Province: (Op Herrick 9) | 3 Commando Brigade | |
| Apr - Oct 11: Afghanistan (Op Herrick 14) | 3 Commando Brigade | |
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