73 Anti-Tank Regiment RA was formed from cadres from 13 & 52 Anti-Tank Regiments in November 1940, at Leeds. Three batteries were formed with a fourth added in September 1942. The Regiment was disbanded in November 1945.
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.
| Nov 40 | Formed | Leeds, Yorkshire, UK | |
| Nov 40 |  |
8 Support Group | UK |
| Jul 42 | |
8 Armoured Division | Alamein, Egypt |
| Oct 42 | |
8 Armoured Division | Egypt |
| Jan 43 |  |
8 Army | N Africa |
| Jun 43 | Cadre to form 106 Anti-Tank Regiment | ||
| Jul 43 | |
8 Army | Sicily |
| Sep 43 | |
8 Army | Italy |
| Jan 44 | Home Forces | UK | |
| Mar 44 |  |
2 Army | UK |
| Jun 44 |  |
30 Corps | NW Europe |
| Nov 44 | |
2 Army | NW Europe |
| Feb 45 | 198 Battery at Kervenheim attached 3 Infantry Division | NW Europe |
Batteries
| Nov 40 | A, B, C |
| Sep 42 | A, B, C, 234 |
| Oct 42 | Q, R, S, T |
| Mar 43 | 195, 196, 197, 234 |
| May 43 | 195, 196, 198, 234 |
| Jun 44 | 198 & 234 Batteries detached to 50 Division for D Day assault. 12 x M10 17 pdr each |
Equipment
| Nov 41 | 48 x 2 pdr, 16 x 18 pdr (18 pdr issued for Op Crusader) |
| Feb 43 | 6 pdr SP Deacon |
| Jun 44 | M10 Self Propelled 3 inch & 17 pdr (198 & 234 Batteries), 17 pdr towed (195 & 196 Batteries). Valentine OP/Command tanks |