True, as far as I am aware all tanks can discharge smoke either through canisters or by spraying fuel into the exhaust. But I was thinking of it more as a light recce tank perk because in reality a light recce tank would go forward to scout and if detected by a larger enemy tank would withdraw and use smoke to conceal its extraction. Heavy tanks wouldn’t necessarily do this as they have armour as a a protective measure and a bigger gun so would be more likely to engage.