121 (West Riding) Medium Regiment RA (TA) was formed by the conversion of 121 Field Regiment in January 1944. It went into suspended animation in April 1946. 121 (West Riding) Medium Regiment RA (TA) was reconstituted as 321 (West Riding) Heavy Anti-Aircraft Regiment RA (TA) in January 1947.
Illustrations of the formation badges under which a unit served or supported are given. This is no guarantee that the unit used this formations badge.
| Jan 44 | Formed from 121 Field Regiment | Felixstowe, Suffolk, UK | |
| Jan 44 |  |
2 Army, 5 Army Group RA | Felixstowe, Suffolk, UK |
| May 44 | |
2 Army, 5 Army Group RA | Clacton, Essex, UK |
| Jun 44 | |
2 Army, 5 Army Group RA | Rucqueville, France |
| Jun 44 | |
2 Army, 5 Army Group RA | Audrieu |
| Jul 44 | |
2 Army, 5 Army Group RA | Caumont, France |
| Aug 44 | |
2 Army, 5 Army Group RA | Le Parquet, France |
| Aug 44 | |
2 Army, 5 Army Group RA | Vernon, France |
| Oct 44 | |
2 Army, 5 Army Group RA | Nijmegen, Holland |
| Oct 44 | |
2 Army, 5 Army Group RA | Antwerp, Holland |
| Nov 44 | |
2 Army, 5 Army Group RA | Rosendaal, Holland |
| Nov 44 | |
2 Army, 5 Army Group RA | Schinveldt, Holland |
| Nov 44 | |
2 Army, 5 Army Group RA | Tevern, Germany |
| Dec 44 | |
2 Army, 5 Army Group RA | Liége, Belgium |
| Dec 44 | |
2 Army, 5 Army Group RA | Mont Gauthier, Belgium |
| Jan 45 | |
2 Army, 5 Army Group RA | Baillonville, Belgium |
| Jan 45 | |
2 Army, 5 Army Group RA | Monville, Luxembourg |
| Jan 45 | |
2 Army, 5 Army Group RA | Cheoux, Luxembourg |
| Feb 45 | |
2 Army, 5 Army Group RA | Mook, Holland |
| Feb 45 | |
2 Army, 5 Army Group RA | Reichswald |
| Feb 45 | |
2 Army, 5 Army Group RA | Hau, Germany |
| Feb 45 | |
2 Army, 5 Army Group RA | Goch, Germany |
| Mar 45 | |
2 Army, 5 Army Group RA | Bönninghardt, Germany |
| Mar 45 | |
2 Army, 5 Army Group RA | Appeldorn, Holland |
| Mar 45 | |
2 Army, 5 Army Group RA | Bienen, Germany |
| Apr 45 | |
2 Army, 5 Army Group RA | Nordlohne, Germany |
| Apr 45 | |
2 Army, 5 Army Group RA | Bremen, Germany |
Batteries
| Jan 44 | 275, 276 |
Equipment
| Jun 44 | 5.5 inch Guns, Matador Tractors |
Casualties
The numbers below are the total casualties suffered in the regiment during the course of the war. Note that these figures account for deaths as a result of ill health, accidents and enemy action.
| ORs | 34 |
| NCOs | 11 |
| Officers | 6 |
Commendations
The numbers below are the total commendations received by all members of the regiment during the war.
| Distinguished Service Order (DSO) | 1 |
| Bar to Military Cross (MC) | 1 |
| Military Cross (MC) | 6 |
| Military Medal (MM) | 3 |
| Member of the Order of the British Empire (MBE) | 1 |
| French Croix de Guerre | 2 |
| Chevalier Order of Leopold with Palm | 1 |
| Belgian Croix de Guerre with Palm | 2 |
| Mentioned in Despatches (MiD) | 20 |
| Commander in Chief’s Certificate | 19 |
Page last updated on 23/5/26.