56 Light Anti-Aircraft/Anti-Tank Regiment RA (TA) was formed in August 1942 by re-designation of RHQ 56 Anti-Tank Regiment with 221 & 222 Batteries plus 163 & 164 Light Anti-Aircraft Batteries from 55 Light Anti-Aircraft Regiment. In September 1944, RHQ 55 Light Anti-Aircraft/Anti-Tank Regiment RA (TA) was re-designated 56 Anti-Tank Regiment. 163 Battery converted to 351 Anti-Tank Battery and 164 Battery was under command 5 Indian Infantry Division.
| Aug 43 | Formed from 56 Anti-Tank & 55 Light Anti-Aircraft Regiments | India | |
| Aug 43 |  |
5 Indian Division | Chittagong, Bangladesh |
| Oct 43 | |
5 Indian Division | Burma (Myanmar) |
| Dec 43 |  |
161 Indian Infantry Brigade, 33 Indian Corps | Burma (Myanmar) |
| Apr 44 | |
33 Indian Corps | Burma (Myanmar) |
| Jun 44 | |
5 Indian Division | Burma (Myanmar) |
| Aug 44 | Became 56 Anti-Tank Regiment |
Batteries
| Aug 43 | 221 (Atk), 222 (Atk), 163 (LAA), 164 (LAA) |
Equipment
| Aug 43 | 6 pdr Anti-Tank Gun, 40 mm Bofors |