156 (Lanarkshire Yeomanry) Field Regiment RA (TA) was formed in April 1940 with two batteries as a duplicate of 155 (Lanarkshire Yeomanry) Field Regiment RA (TA). A third battery was formed in January 1941. In July 1942 it moved to the Middle East and joined 5 Infantry Division. It served with the Division throughout the remainder of the war. It saw service in North Africa, Scicily, Italy and North West Europe. Post war the Regiment went into suspended animation in December 1945. 156 (Lanarkshire Yeomanry) Field Regiment RA (TA) was disbanded in January 1947.
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.
| Apr 40 | Formed | Strathavon, Lanarkshire, UK | |
| Apr 40 | Home Forces | UK | |
| Jul 42 |  |
Middle East Forces | N Africa |
| Aug 42 |  |
5 Infantry Division | Iraq |
| Sep 42 | |
5 Infantry Division | Persia (Iran) |
| Jan 43 | |
5 Infantry Division | Syria |
| Jun 43 | |
5 Infantry Division | N Africa |
| Jul 43 | |
5 Infantry Division | Sicily |
| Sep 43 | |
5 Infantry Division | Italy |
| Jul 44 | |
5 Infantry Division | Palestine |
| Feb 45 | |
5 Infantry Division | Italy |
| Mar 45 | |
5 Infantry Division | NW Europe |
| Dec 45 | Suspended animation |
Batteries
| Apr 40 | A, B |
| Jan 41 | A, B, C |
| Mar 42 | P, Q, R |
| Jan 43 | 591, 592, 593 |