I play in the clan "2RTR" as gamertag "Panzergranate_".
Like myself, a few members are ex-millitary tank crew and a few are just ex-millitary.
It does mean that we can operate in proper tank formations and switch to "echlon left", "wedge", "echlon right", etc. on command pretty slickly.
We're also used to saving the game after most of the side has been killed in stupid lemming rushes. In one game the remaining two of us took out the remaining 7 of the enemy side to win.
The clan is usually active on EU-2 servers and quite a few Canadians are also in the clan.
On a rare occasion we had two out of the three 2RTR squadrons operating that night were in the same game and on the same side allowing us to operate as a 6 tank unit.
So if you see a bunch of Matildas, Churchills, Valentines, Centurions, etc. advancing in perfect formation and coordinating their collective power on some poor victim, it's most likely one of the 2RTR squadrons. Depending on what side you're on either flee or join in.