84 Anti-Tank Regiment RA was formed at RHQ 54 Anti-Tank Regiment in Alloa in September 1941. It took over batteries from four different anti-tank regiments. 84 Anti-Tank Regiment RA was disbanded in July 1944.
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.
| Sep 41 | Formed from 13, 54, 61 & 64 Anti-Tank Regiments | ||
| Sep 41 | Home Forces | Alloa, Clackmmanan, UK | |
| Jul 42 |  |
10 Armoured Division | Egypt |
| Oct 42 | |
10 Armoured Division | Alamein, Egypt |
| Dec 42 | 209 Battery to 105 Anti-Tank Regiment on formation | ||
| Jan 43 | |
10 Armoured Division | Syria |
| Sep 43 | |
10 Armoured Division | Egypt |
| Jul 44 | Disbanded |
Batteries
| Sep 41 | 44, 213, 244, 253 |
| Oct 41 | 209, 213, 244, 253 |
| Mar 42 | 200, 209, 213, 244, 253 |
| Dec 42 | 200, 213, 244, 253 |
Equipment
| Aug 42 | 213 Battery – 8 x 6 pdr Self Propelled Deacon |
| Oct 42 | 64 x 6 pdr Guns |