186 Field Regiment RA was formed in December 1942 with three batteries at Auchterarder, Perth. The Regiment served entirely with 52 Infantry Division going to NW Europe with them in October 1944. 186 Field Regiment RA 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.
| Dec 42 | Formed | Perth, Perthshire, UK | |
| Dec 42 |  |
52 Infantry Division | UK |
| Oct 44 | |
52 Infantry Division | NW Europe |
| Nov 44 | |
52 Infantry Division | Walcheren Island, Holland |
| Nov 45 | Disbanded |
Batteries
| Nov 44 | 192, 193, 194 |