78 (1st East Anglian) Anti-Aircraft Brigade RA (TA) was formed in November 1938 by conversion of 84 (1st East Anglian) Field Brigade RA (TA). It was re-designated as 78 (Welsh) Anti-Aircraft Regiment in January 1939. In June 1940 it became 78 (1st East Anglian) Heavy Anti-Aircraft Regiment RA (TA). It served in the UK, Middle east and Italy. The Regiment was placed in suspended animation in December 1944. 78 (1st East Anglian) Heavy Anti-Aircraft Regiment RA (TA) was reconstituted as 284 (1st East Anglian) (M) Heavy Anti-Aircraft Regiment RA (TA) 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.
| Sep 39 |  |
2 Anti-Aircraft Division, 41 Anti-Aircraft Brigade | East Anglia, UK |
| May 41 | |
2 Anti-Aircraft Division, 40 Anti-Aircraft Brigade | East Anglia, UK |
| Dec 41 | |
2 Anti-Aircraft Division, 41 Anti-Aircraft Brigade | East Anglia, UK |
| Apr 42 |  |
War Office Reserve | UK |
| Oct 42 |  |
9 Army | Palestine |
| Jan 43 |  |
Middle East Forces, 20 Anti-Aircraft Brigade | The Levant |
| Feb 43 | Diluted by African Pioneer Corps men | ||
| Nov 43 | |
Middle East Forces | Eygpt |
| Jan 44 |  |
8 Army, 8 Anti-Aircraft Brigade | Brindisi, Italy |
| Dec 44 | Suspended animation |
Batteries
| Sep 39 | 243, 244, 245, 409 |
| Oct 41 | 243, 244, 245, 468 |
| Apr 42 | 243, 244, 245 |