139 (Mixed) Heavy Anti-Aircraft Regiment RA (TA) was formed at Rotherham in December 1941. The Regiment served with Anti-Aircraft Command until November 1944. It then moved to Bussels in Belgium as part of 101 Anti-Aircraft Brigade in 21 Army Group. 139 (Mixed) Heavy Anti-Aircraft Regiment RA (TA) was disbanded in May 1945 at Ticknall near Derby.
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 41 | Formed | Rotherham, Yorkshire, UK | |
| Jan 42 |  |
10 Anti-Aircraft Division, 62 Anti-Aircraft Brigade | West Yorkshire, UK |
| Aug 42 | |
10 Anti-Aircraft Division, 65 Anti-Aircraft Brigade | West Yorkshire, UK |
| Aug 43 |  |
5 Anti-Aircraft Group, 32 Anti-Aircraft Brigade | Derbyshire, UK |
| Feb 44 | |
5 Anti-Aircraft Group, 63 Anti-Aircraft Brigade | Nottinghamshire, UK |
| Nov 44 |  |
21 Army Group, 101 Anti-Aircraft Brigade | Brussels, Belgium |
| May 45 | Disbanded | Ticknall, Derbyshire, UK |
Batteries
| Dec 41 | 483 (Mixed), 484 (Mixed), 485 (Mixed) |
| Feb 41 | 483 (Mixed), 484 (Mixed), 485 (Mixed), 518 (Mixed), 519 (Mixed), |
| Jun 41 | 483 (M), 484 (M), 485 (M), 518 (M) |
| Aug 43 | 483 (M), 484 (M), 485 (M), 518 (M), 668 (M) |
| Feb 44 | 483 (M), 484 (M), 485 (M), 518 (M) |
| Nov 44 | 483 (M), 484 (M), 485 (M) |