79 Anti-Aircraft Brigade RA(TA) was formed in November 1938 by expansion of 343 (Watford) Field Battery RA(TA). It was re-designated as 79 Anti-Aircraft Regiment RA(TA) in January 1939 and as 79 (Hertfordshire Yeomanry) Anti-Aircraft Regiment RA(TA) in July 1939. In June 1940 it was re-designated as Heavy Anti-Aircraft. The Regiment was placed in suspended animation in March 1945 and reconstituted as 479 (Hertfordshire Yeomanry) Heavy Anti-Aircraft Regiment RA(TA) in January 1947.
| Sep 39 | 37 Anti-Aircraft Brigade, 6 Anti-Aircraft Division | South East airfields, UK |
| Nov 39 | Anti-Aircraft Command | Felixstowe, Suffolk, UK |
| Mar 40 | 3 Anti-Aircraft Brigade | Le Havre, France |
| Jun 40 | 37 Anti-Aircraft Brigade | Cherbourg, France |
| Jul 40 | 45 Anti-Aircraft Brigade, 5 Anti-Aircraft Division | South Wales, UK |
| Nov 40 | 61 Anti-Aircraft Brigade, 9 Anti-Aircraft Division | Swansea, Glamorgan, UK |
| Apr 42 | 11 Anti-Aircraft Brigade | Eastleigh, Hampshire, UK |
| Jun 42 | 55 Anti-Aircraft Brigade | Cornwall, UK |
| Oct 42 | War Office Reserve | Uttoxeter, Staffordshire, UK |
| Feb 43 | 1 Army | Algeria |
| Feb 43 | 66 Anti-Aircraft Brigade | Philippeville, Algeria |
| Mar 44 | 52 Anti-Aircraft Brigade | Foggia, Italy |
| Jun 44 | Regiment diluted with Basuto’s from the African Pioneer Corps |
Foggia, Italy |
| Aug 44 | Allied Force HQ – US 5 Corps | Leghorn, Italy |
| Oct 44 | 12 Anti-Aircraft Brigade, 8 Army | Rimini, Italy |
| Mar 45 | Suspended animation |
Batteries
| Sep 39 | 246 (1st Watford), 247 (2nd Watford), 248 (Welwyn) |
| Mar 41 | 246, 247, 248, 398 |
| Aug 41 | 246, 247, 398, 437 |
| Jun 42 | 246, 247, 398 |
Gun Sites Occupied
246 Battery
| Date | Gun Site | Gun Defended Area |
| Feb 41 | N2 Neath (4 guns) S Mumbles (2 guns) |
Swansea |
247 Battery
| Date | Gun Site | Gun Defended Area |
| Feb 41 | U Morriston (4 guns) N3 Jersey Marine (4 guns) |
Swansea |
248 Battery
| Date | Gun Site | Gun Defended Area |
| Feb 41 | T Sketty | Swansea |
