4th Armored Brigade, Royal Tank Corps WWII.
The Black Rats

The Brigade was founded in 1939 as the Heavy Armoured Brigade (Egypt). At the outbreak of WWII, the name was changed to the 4th Armoured Brigade under command of the 7th Armored Division. The Brigade would see continuous action throughout the North African Campaign, Sicily, Italy, and NW Europe.
Under the 7th Armored Division, the Brigade fought from Operation Compass to El Alamein. Thereafter, the Brigade came under various Corps commands as an independent Brigade.

OOB:
7th Queen's Own Hussars
2nd RTR, 8/1940
6th RTR. 1939- 2/1941 to 3rd AB
8th King's Royal Irish Hussars RTR
3rd RTR, 5/1941- 7/1942
5th RTR, 5/1941
11th Hussars RAC (recce)
4th/8th Hussars
Royal Scot Greys RTR, 6/1942
3rd County of London Yeomanry RTR
44th RTR
50th RTR
1st East Riding Yeomanry RTR
1st Household Cavalry Regiment RC, 7/1943-5/1944