56 (Highland) Medium Regiment RA(TA) was re-designated from 56 Medium Brigade with two batteries in November 1938. The Regiment went to suspended animation in March 1946 at Boldney Airfield, Thetford and was reconstituted as 356 (Highland) Medium Regiment RA(TA) in January 1947.
| Nov 38 | Scottish Command | Aberdeen, Aberdeenshire, UK |
| Oct 39 | 3 Corps | France |
| Jun 40 | Home Forces | UK |
| Jan 43 | 76 Infantry Division | UK |
| Sep 44 | 47 Infantry Division | UK |
Batteries
| Nov 38 | 174 (North Scottish), 221 (Peterhead) |
| Jan 43 | 95, 96, 174, 221 + 139 & 140 Field Batteries & 7 & 10 Heavy Batteries |
| Jul 43 | 95, 96, 174, 221 |
| Nov 43 | 96, 174, 221 + 7 Heavy Battery |
| Feb 45 | 96, 174, 221 |
| May 45 | 95, 96, 122, 174, 221 |
Equipment
| Sep 39 | 6 inch Howitzers (iron wheels) |
