Smoke dischargers on tanks
 

I know that most of the WW2 tanks had smoke dischargers in order to conceal the tanks, some had smoke grenade lounchers mounted outside the tank on the turret. Because in some incidents the crews of the tanks were incapacitated by the smoke from their own smoke when those grenades were ignited by small arms fire in the later part of the 2nd world war this devices were moved inside the tanks.

Some tanks had the engine exhaust mixed with special chemicals in order to create smoke screens also there were specially made vehicles that created smoke screens.

I think this will add to the realism of combat and it will be a nice addition to this great game, but only for vehicles which have some in RL. Smoke cover is good when the tank has some damaged components and needs fixing, retreating to a safe location or simply for ambush purposes.

I personally use smoke grenades form the SMG infantry but it would be nicer to have an menu button that when pressed would make the tank or vehicle instantly lounch from 2 to 6 smoke grenades (depending of type of tank) .

Also smoke ammo should be available in the ammunition truck for all artillery guns and some tanks.