Looking at the list for the Korean War UN list on p62, the Cromwells, Comets, Centurions and Churchills are restricted to [3] each.
There are no caveats as far as I can tell, nor does the Battlegroup creator indicate differently, but it would appear that all four types could be used together 51-53.
I assume that reflects the mix of nationalities and units deployed as part of 1st Commonwealth Division. However,
8 KRIH - Centurion and Cromwell(Recce)
7 RTR - Churchill (neutered Crocs). C Squadron
5 Skins - Centurion
1 RTR - ?
5 RTR - ?
Lord Strathcona's Horse (Royal Canadians) - Sherman M4A3E8
The wiki entry for the Comet indicats that they were used in Korea, but so far I cannot find out who used them.
The ARS topic on Comets in Korea comes down firmly on the view of no Comets, only Centurions.
http://www.arrse.co.uk/rac/121870-comets-korea-... As to numbers:
http://en.wikipedia.org/wiki/1st_Commonwealth_D... The British fielded once regiment of 4 Squadrons (64 Centurions) rotating regiments plus a Churchill Squadron for a short period early on.
The Canadians fielded one squadron (on rotation) of Shermans.
Any information welcome.
Steve