The Regiment was formed in 1900 as 9 Brigade Royal Field Artillery. 9 Field Brigade was re-organised in May 1938 as 9 Field Regiment RA on a two battery basis. In January 1941 it was re-organised as three batteries. Post war 9 Field Regiment RA became 23 Field Regiment RA in April 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.
| 3 Sep 39 |  |
Southern Command | Bulford, Wiltshire, UK |
| 15 Sep 39 |  |
5 Division | Evreux, France |
| Oct 39 | |
5 Division | Lille, France |
| May 40 | |
5 Division | Seclin, France |
| May 40 | |
5 Division | Plouvain, France |
| 22 May 40 | |
5 Division | Oppy, France |
| 29 May 40 | |
5 Division | Moëres, France |
| 1 June | |
5 Division – embarked for UK | Dunkirk, France |
| Jun 40 | |
5 Division | Fintray, Aberdeenshire, UK |
| Mar 42 |  |
17 Infantry Brigade Group | Madagascar |
| Jun 42 |  |
22 East African Infantry Brigade | Madagascar |
| Nov 42 | Force Troops | Madagascar | |
| Jan 43 | Ahmednagar area | India | |
| Mar 43 |  |
39 Indian Division | Hazaribagh, India |
| Aug 43 |  |
20 Indian Division | Ranchi, India |
| Nov 43 | |
20 Indian Division | Tamu, Burma (Myanmar) |
| Jul 45 |  |
Central India Command | Dehra Dun, India |
Batteries
| Dec 19 | 19, 20, 28, 76 |
| May 38 | 19/28, 20/76 |
| Jan 41 | 19, 20, 28/76 |
Equipment
| Sep 39 | 18 pdr & 4.5 inch Howitzer (guns destroyed on 29 May 40 in France |
| Nov 43 | 25 pdr |