1st Battalion, The Welch Regiment
| Dates | Locations | Higher Formation | Remarks |
| | | |
| 1945.05 | Austria | | |
| 1945.09 | Italy | | |
| 1946.08 | Trieste: Opicina Barracks | | |
| | Spring 47 - 24 Oct 47: Cavalry Barracks, Udine | | |
| 1947.10 | England: Woodfarm Camp, Malvern | | |
| 1948.02 | Wales: Dering Lines, Brecon | Depot Bn | |
| 14 Jun 48: amalgamated with 2nd Battalion without change of title | | |
| | 17 Sep 48: presented with New Colours | | |
| 1950.10.11 | England: Sobraon Barracks, Colchester | | |
| | 9 Oct 51: embarked at Southampton | | |
| 1951.11 | Korea | 29 Infantry Brigade Group | |
| | 9 Nov 52: at sea (embarked at Pusan) | | |
| 1952.11 | Hong Kong | 27 Infantry Brigade | |
| 1954 | Wales: Llanion Barracks, Pembroke Dock | | |
| 1956.06 | Germany: Worcester Barracks, Lüneburg | 10 Infantry Brigade Group | |
| 1957.08 | England: | | |
| 1957.10 | Cyprus: Dhavlos | | |
| | Oct 58: Cyprus: Alexander Barracks, Dhekelia | | |
| 1958.12 | Libya: Benghazi | | |
| 1960 | UK | | |
| 1961.05 | Berlin: Brooke Barracks | Berlin Brigade | |
| 1963 | England: Knook Camp, Warminster | Demonstration Battalion | |
| | 1965: Battlesbury Barracks, Warminster | Demonstration Battalion | |
| 1966.06 | Hong Kong: Stanley Fort | | |
| 1968.07 | England: Milton Barracks, Gravesend | | |
| 11 Jun 69: amalgamated with 1st Bn, The South Wales Borderers, to form | | |
| 1st Bn, The Royal Regiment of Wales | | |
| | | |
2nd Battalion, The Welch Regiment
| Dates | Locations | Higher Formation | Remarks |
| | | |
| 1945 | Burma | | |
| 1947.11 | England: Woodfarm Camp, Malvern | | |
| 14 Jun 48: amalgamated with 1st Battalion | | |
| | | |
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