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. The Regiment was disbanded in July 1944.
| 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 |
